If you are willing to drive to the burbs, there is a great place called "Salt Creek BBBQ". They have two locations--the original one is in Elk Grove, on Devon, just west of O'Hare. The other is in Glendale Heights, on North Ave.a couple of miles west of 355--it's across from Menards.
There is also a place in Plainfield/Joliet called Baby Back Clues. It's in a little nook of a strip mall on Route 30 just west of I-55.
These are the 2 best places that I know of around here--and they are definitely worth the drive.
That would be Baby Back Blues in Plainfield
23145 W. Lincoln Hwy
Wife and I chowed there last night on a mess o'ribs and pulled pork. The place's decor is either an s-hole or perfect, depending on your taste (I think it's perfect). but the food is way good. comparable to many BBQ places in the south, and surpassing BBQ eaten recently in Dallas.
Fab coleslaw, and a good throw on the fountain drinks.