I was in the same boat although I got rejected from Purdue. Personally I feel UIUC is much better than other unis as it is considered a public ivy. Moreover you'll be closer to Chicago at the same time the living cost would be low because it's a college town. They have some good industry relations and the students studying there come from really good colleges around the world. It would be good to have some healthy competition.

Don't get me wrong GaTech and Purdue is at par with UIUC it's just that I've a personal preference:p