The Panasonic Jetspin is indeed one beast of an upright, ranking in the Wirecutter's list as the Best Budget pick. The Panny is one of the better big box store options if a bagless canister vacuum option is what you're looking for. It proved to be a little too much machine for our small apartment while reviewing, but the MC-UL915 Jetspin Cyclone earned a "Strong Recommend" for home owners with a mix of carpet and hardwood.
We agree the Dyson DC 28 Animal is one fearsome feature-performance equipped cleaning machine, but if you're serious about keeping both the floors and air around you clean with air quality in mind, we'd steer you over to the Miele line. Miele vacuums are notoriously expensive, but the proof is in the airborne laser particle reader readings. Zero. And those on a budget with aspirations for a Miele can now consider their Olympus S2, which shares many of the filtration technologies as its more expensive siblings, but in a price range in the same zip code as the Panasonic or Dyson.