I dunno what all is out there, but these La-Z-boy office chairs are the best Ive ever used. They had them for sale at Staples for like $60 and I bought 5 of them for everyone in my office and everybody is in love with these chairs. I tried out a lot of office chairs, but the second I sat in that lazyboy I could feel it was made perfectly to fit the human spine. The La Z boy office chair is endorsed by the American chiropractic associaition. By far the best office chair Ive ever used.
My weight is 230-250 and I expect an office chair to usually break after a couple years