The best thing money can buy seems to be the "Herman Miller Aeron"
It was the de facto chair in the valley just before the internet bubble burst
Many people just swear by this chair, I might purchase one if I can find
a good bargain on e-bay, because brand new they`re pretty expensive, but my
butt & my back deserves it.
Do a Google seach on "Herman Miller Aeron chair blog" you will find many
entries about this top notch chair ...
Best Regards from France,