Link To All Good Questions
Thanks for your question Jon. Coming from a person with metal in her back, we can tell you that not all chairs are created equal but...each chair serves different people. We would definitely go test drive them all for 15 min or longer if you can hang out in the store. If you have certain issues such as lumbar support or other requirements make sure to ask your questions then.
You may also inquire whether the store has a return or exchange program so that if you do get it home and you hate it after 7-10 days you may be able to exchange it for something else. Readers? any experience with any of these chairs?