Have you tried Wallingford Pizza House yet?I briefly lived in Chicago and thought the "Chicago style pizza" they have there is fairly close to anything I had in Chicago.
I can count on one hand the number of restaurants I've been to here, but honestly I've never been the biggest fan of Chicago style pizza. It's just like this huge slab of food that settles to the bottom of my stomach and takes three days to digest. That said, I will certainly check it out when I have the means to pay for my own food.