Finally something I feel I can actually contribute too!
When starting my first architectural job my boss took me to two places: their local computer builder to pickup a nice computer and the local Steelcase retailer to pickup a nice chair.
He said that he only will be using two things: my brains and my ass. And he wanted them both to be well supported.
Look at Herman Miller and Steelcase lines, both of which have top-of-the-line models but typically have a 1 or 2 step lower model for cheaper money but don't fool yourself, it will be pricey.
I personally have 2 Steelcase Leap chairs, one at home & one at my office @ $900-1k ea. but I'd write that check everytime because they are light years ahead of the Office Depot/Max, Staples forms.
Here's a good website, if you haven't found it already: http://www.sit4less.org/