What is a good place for a business lunch near the Willis Tower in Chicago?

Rock Star Cafe or the Rainforest Cafe both have Excellent food and its a great time

N9NE Steakhouse or the pricey Everest on the 40th floor the the stock exchange building. Really depends on your budget. Rock star and rainforest or both fun but Noisey..I am not sure how much real business could be done there..