thats interesting i was myself looking to buy a good chair now.
The one i have is not good at all... and i seat many hours per day working (and yes i got fat a little lol ).
So i thogh about that HERMAN MILLER AERONS CHAIRS....
its a little expensive iam not sure i will buy but... it seem very good.
http://www.hermanmiller.com/hm/conte...s_brochure.pdf