I took the plunge about two years ago and picked up an aeron for our home office.
Gotta say I love ours, I can sit in it all evening and be comfortable the entire time.
I don't think that the Posture Fit option is worth the extra $90.00, though.
I picked it up thru
Room and Board they had a $100 off deal, and I also had the option to pick it up myself (saving another $75.00)
If you have the opportunity, go sit in one for yourself and see if it's comfortable for you. If you're not comfortable, it doesn't matter how much you've spent on it.
In my chair research I did come across this one... Unfortunately it was out of my price range at the time (around $1200 then, now they seem to be going for about $999) It was <I>really</I> comfortable too.
Humanscale Freedom Chair
