onodrim

If you're looking for the <i>best</i> in Chicago and price truly isn't an issue, then go to Charlie Trotters. I believe it is one of only a very few five star restaurants in Chicago, and supposed to be one of the best in the nation as well. As such, it is very very pricey and has a "jackets required" kind of dress code, but hey, you wanted to know the best.
Here's a few links for more info:
http://www.charlietrotters.com/restaurant/
http://metromix.chicagotribune.com/d...,7901320.venue

If you'd like something also very good and a little more unique and laid back and not quite as pricey, check out Foca de Chao. It's a Brazillian steakhouse where you pay $50 for dinner, and bascially get all the steak/pork/lamb/etc that you want to eat plus potatoes/salad/etc until you tell them to stop bringing you food.
Again a link for more info:
http://www.fogodechao.com/

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"The world is so exquisite with so much love and moral depth, that there is no reason to deceive ourselves with pretty stories for which there’s little good evidence. Far better it seems to me, in our vulnerability, is to look death in the eye and to be grateful every day for the brief but magnificent opportunity that life provides"
-Carl Sagan