You guys are all NUTS. Those pizza places are where people who's never eaten Chicago pizza go...BJ's??? Uno's??? PLEASE...Chi-town would keel over an have a collective heart attack! Here are the hands down three best places to get Chicago Pizza (in order of tastiness with #1 being the best):

1) Giordano's - multiple locations in Chicago and 'burbs
http://www.giordanos.com
*Hands down, the best Chicago stuffed deep dish pizza with a very flakey and buttery crust*

2) Edwardos - multiple locations in Chicago and 'burbs
http://www.edwardos.com
*Also a Chicago stuffed deep dish pizza, but not as good as Giordano's. This place is known for their spinach pizzas...yes, sounds weird until you actually eat a slice.*

3) Lou Malnati's - multiple locations in Chicago and 'burbs
http://www.loumalnatis.com
*Deep dish, but NOT stuffed, thus not as tasty as the two posted above. Good for people who like lots of sauce, but not necessarily as much cheese and toppings. I personally don't care too much for this, but it's still better than BJ's and Unos!*