[matrix]

I can't recommend the Steelcase Leap enough. Maybe I'm in the minority, but I found the Aeron chairs to be somewhat uncomfortable. The Steelcase Leap, on the otherhand... I've had it for a year and couldn't imagine working without one.

I found mine for $100 on Craiglist, so maybe try there.

[flowereater]

Second the steelcase leap. It has a nice "recline mode" which I make copious use of. Make sure you get the version 2.