OK-I need to say that among all the "Usual Suspects" mentioned earlier-Lou Malnati's is the best. Perfect crust, fresh tasting tomato sauce (on top) and a LOT of high quality sausage and cheese. This is the paradigm of Chicago Pizza. If I could only go to one pizza place for the rest of my life-this would be it. don't bother with the others-they are weak in comparison.
Warning-This pizza should come with a disclaimer about heart disease-it is not low-anything.
Agree with the person who said Ranalli's was way overrated. In a word-gross! And I lived in Iowa for 4 years- a place void of any good pizza whatsoever so I know a bad pizza when I taste it.