Congratulations on your house!

Potential solutions:

I would move the TV to the opposite wall, and float a sofa perpendicular to the fireplace. I would put armchairs on either side of the fireplace so that you can watch TV, enjoy a roaring fire, etc. without the furniture pointing toward either one.

You will cut off some of the "grand hall" vibe of the living room, with those great high ceilings, but it will be more functional because you don't have to push furniture to the walls and it won't seem like you're burying your TV in the corner. I dislike when the TV is in the room, but is shuffled off to the side. Most of the time, people think putting the TV in the corner hides it when doing this actually draws more attention to it.

Hello - Well don't you have a lucky problem? I love your sofa choice... love love love. But I would feel a bit closterphobic with two sofas - your space is big but rather narrow. I'd opt for one sofa and one oversized fabric chair (since your sofa is leather, you might want something a bit more welcoming in the cold of winter). How about this chair from Ashley:http://www.smithfurniturestore.com/furniture-images/ashley-furniture/living-room-furniture/living-room-chairs/delhi-cafe-oversized-chair.jpg

I'm not sure I'd place the tv in the corner you indicate - I'd place it on a angle in the corner on the other side of the fireplace so you can position your sofa a foot or so away from the window - looking towards the dining room. Please post photos when you are done!

I'd do a sectional like this one from Crate and Barrel. It will give you a comfy place to watch TV and a the chaise on the other end will serve as extra seating without blocking the view from the dining room. Use a chair and lamp to create a reading nook in one of the corners closer to the dining room, where it currently looks like you have a desk set up.

@Kanberra - It's spelled (and pronounced) claustrophobic. Unless you're afraid of Chuck Klosterman.

Excuse me Chuck Klosterman - spelling is not my strong point. I guess your weak point is being nice.

We have a similar living room but not quite as long - it looks like a typical 4 Square layout. You should take a step back from the "one or two sofa" question and ask yourself how you want to use the space. With the length of this space, you could do two separate seating areas - one for the television area and one maybe a reading/conversation area.

Personally, I am not a fan of two full size sofas only because it looks too "fraternity house." Maybe a sofa and arm chairs in one seating area and a love seat or chaise with arm chairs in the other seating area. In the middle of the two spaces and in front of the fireplace, put big old table with a big vase of flowers.

Always two sofas if they will fit.

Given the theoretical circulation around the room, the windows, and the wide open connections to the other rooms, I would suggest three layouts: One, a single sofa centered in front of the fireplace with chairs to either side. Two, a traditional two-sofa layout with both sofas facing one another on either side of the fireplace. Three, a hybrid layout where the sofas are placed on both sides of the fireplace at 45 degree angles. Since you would be "floating" the furniture in the living room floor, both layouts will likely work best with sofa tables behind the sofa or side tables at the sofa ends. Since the layouts are centered in front of the fireplace they will also need your televison to be relocated to a position over the fireplace mantel, preferably mounted on a manual or electrically retracting wall bracket for easier viewing.

I strongly suggest you test out these options in the room before buying more furniture. You can do this by carefully measuring the largest dimensions of the pieces you're considering for purchase (roll arms, etc included) then laying out those dimensions on your floor with masking tape. Then live with the layout for a week or two and see whether you like it.

Good Luck!

Think about how the seating will be used. If you plan to use that fireplace a lot and want to snuggle in front of it, get a long sofa that two can stretch out on. But if you're very social and want to encourage conversation among your guests, put two loveseats facing each other, perpendicular to the fireplace. (And ignore the word "matchy-matchy." It doesn't apply here. Bad "matchy-matchy" is when the shoes, the belt, the bag, and the hat are all trimmed in the same plaid patent leather; wearing two shoes of the same kind is not matchy-matchy. Likewise, it's matchy-matchy to use the same pattern on the wallpaper, the drapes, the bedspread and the dust ruffle; a pair of identical loveseats is OK. And frankly, even if you wanted to go full-on matchy-matchy, there are ways to make it work.)

You have a gorgeous living room! Our has similar dimensions (but our windows, fireplace, and doorways are in different places). It's a nice size, but really hard to arrange furniture in. With your layout, I would be inclined to have two sofas facing each other in the middle of the room, with the fireplace to the side, but I guess that doesn't leave a good spot for the TV. The masking tape suggestion someone made earlier was a good one. You can even fill those spaces with boxes (I'm sure you have plenty if you just moved) to the height of the item you are considering to see how it fits with the flow of the room.

Here are some pictures of our living room as it is now. We rearranged it a number of times, but it has been this way since before the pictures were taken last fall, and I think this is the best we've come up with. It gives us two seating areas, for when we have guests, and accommodates the TV nicely without making it the focus of the room. http://community.apartmenttherapy.com/contests/color/2011/entries/3108

Your layout will obviously have to be somewhat different, but I do think it's usually best to have a couple of distinct areas in a long narrow room, unless you plan to center everything around the fireplace.

what a lovely living room! it has great architectural details. I personally think one sofa is the best fit due to the flow of the room.

I probably would go with one sofa with its back towards the dn, facing two arm chairs with their backs to the window. that way you can watch tv from the sofa if should be, enjoy the fireplace and have an inviting living room upon entry.

On first glance however your living room totally reminded me of the living room space from the blog door sixteen. (http://www.doorsixteen.com/2011/01/03/the-living-room-has-a-black-wall/) while your space looks bigger and with more doorways, their one sofa and tv placement might give a suggestion for you?

It's a beautiful, but narrow space, so I'd also say one sofa and 2 stuffed armchairs, and maybe one or two occasional smaller chairs for when you have some guests, but it depends on placement.
If you go with 2 sofas, I really like your idea of not having them go "matchy-matchy", but I'm a bit clueless at what else.
If you go 1 sofa and 2 armchairs, I'm pretty sure you can get 2 different armchairs (say, one wingback, and another deco one maybe?), and maybe you can vary colors by not having everything upholstered the same.

And if you don't want upholstered armchairs, you can have anything from an Eames to a Thonet such as this one http://www.dwr.com/product/era-round-arm-with-cane.do?sortby=ourPicks.

floor plan w/ dimensions, sofa info, and style info really does help; thank you! that the space looks nice & the sofa is fairly classic is a bonus. thoughts: does the tv really have to be in this room? if so, can it be moved away from the window to prevent glare? would then consider floating sofa perpendicular to f/p aligned w/ window behind it, except that size allows only 2.5 ft passage on either side, and sofa facing f/p would make room look like tube, so is smaller version of sofa avail? whatever would go across from sofa could be exact match or something(s) short. side thought: drapery rod near the ceiling w/ floor length drapes hung to hide outer edges of window & make room seem a bit wider, acting as frame to sofa.

We have a similar sized living room, although ours has a bank of windows along the long wall and the fireplace on the short wall. We tried to use our two couches from a previous house and it was too much--they sucked the space out of the room. We ended up going with one medium sized couch (not super long or super stuffed/deep) and a couple of comfortable chairs. As someone noted above, even though it is a big room, it will tend to read narrow and two couches will probably overwhelm it, at least in our experience.

I'd prefer the look of one sofa and two chairs for this room... Is there another room that you could use as a tv room? I'm worried it will get crowded. It's a good sized room, but it will be hard to manage the flow with do many focal points and entrances...

I meant "so many." Sorry-- typing on my mobile device.

I think a sectional sofa, a sofa with a chaise, or a regular sofa and a small apartment sized sofa would look better than two full-size sofas. Don't add more furniture than you need, it'll make everything look cramped. You have a beautiful room. :)