Favorite task chair, anyone?  

It may be too late for me, but others may benefit from your recommendation--
I read about the Zody online, it received good reviews-- but, like the Grahl Duo, it wasn't available to try out in any of the stores I shopped. The Haworth Zody looks like the Knoll Life, only on steroids.
One thing I particularly liked about the Knoll chair is the flat "spokes" on the base. You can put your feet on them, if you choose.

location?
I know you've already made your purchase (I have yet to sit in the Knoll, so I can't comment), but where are you located?

New York (city)
Which stores sell the Zody?

Haworth Showroom
Our NY Showroom is on 42nd and Park (right across from Grand Central, where the old satellite airline terminal was). Coincidentally that's where I work. The chairs are normally sold through our dealers (they usually have demos available to loan out for a week), but I've seen them at Sam Flax.
The showroom itself is pretty cool (there was a write-up in Interior Design Magazine last month). If you'd like to come by for a visit sometime let me know.
http://www.interiordesign.net/id_article/CA6544544/id

Shopped Sam Flax
And I recall sampling a Haworth chair, but I don't think it was the Zody. If only there were a task chair boutique which featured EVERY chair, side by side, for easy comparison.