However, as with the case with all the other public schools (non-CA) mentioned so far, you will pay the out-of-state tuition rate. But you'd be at a very top tier CE school, as you saw on the U.S. News list.
Another great thing about UIUC is the diversity. It likes to present itself as an engineering college (and rightly so, top 10 in many engineering disciplines), so it attracts many students from other technical areas around the world (India, Korea, China, Japan, Russia, Bulgaria, etc.). I'm plain old whitebread, but I was the only one in my study group for several years. It was a great chance to meet people from very different backgrounds.
Lastly, they just recently (2004) constructed the Siebel Center for Computer Science which is where they hold most/all of their CS classes. A very modern, high-tech building that can make any CS major drool. Not to mention the other buildings which surround it: NCSA, Beckman Institute, and Grainger Library (will become your 2nd home)
This is the mark of a good learning ecosystem. One that supports diversity. Diversity means less of your "own kind". (by "own kind" I mean, same geo, monetary, political peers, etc) A greater chance to use and view different ideas. This is a real problem with "top" Universities who support and advertise meritocracy, but end up supporting mono-cultural ideals. This might be good if you want to pass school and work the system. It is bad if you want to succeed past school and subvert the system and become not only a good technician, practitioner (I avoid the professional lable) to become an Entrepreneur.
And, you'll probably have a pretty decent social experience. Going to a Big 10 school with one of the largest greek systems in the country can be fun, even if you're not a big college sports or frat fan (and, who isn't a sorority fan?).
I want a startup. I have no doubts that I'll find others like me, especially from such a diverse and intelligent school.