hehe, the slouching part was a joke ;) but i hear ya, i spend 12 + hours in a chair myself, usually at work where i have no choice of the chair i sit in, though they are usually comfortable enough... as long as i lock the chairback. The chair i have at home is comfortable, and i hate to give it up, but the seat coushon is toast and i'm now sitting on the bolt plate, which is a bit hard on my tailbone.
I've got some questions for you guys regarding chairs, but i'm going to make a new thread since we're getting a wee bit off topic here heh.
Just to stay on topic, heres an updated pic of my desk... just becuase i'm tired of seeing all your "tidy" desks ;D an thats not my normal chair...