When I was shopping for a new desk chair I couldn't find one that was really that comfy. I think the ones at the office supply stores are just cheap junk. I wanted something really comfortable, because I spend alot of time at my desk. Aeron's seemed to get great reviews from just about everyone, but I wanted to sit in one before I bought it. I ended up driving up to Stanford just to sit in one for 5 minutes.
I ended up buying an size C Aeron in Lead. I paid $719 shipped and that was by far the best price I could get for one chair.
I'm sitting in it now and I can tell you it is super comfortable. It's got many adjustments, so anyone can adjust it to their likings. I've had many people knock the chair saying that I've paid too much for it. After sitting in it, everyone agrees that it is a great chair. If you spend alot of time sitting, the Aeron is well worth every penny.