i know this thread is a little old but for whatever its worth, i'm in med school @ peoria. ignoring location, MP program here is awesome for a community type place. the attendings on both sides are great - though med is a little stronger, peds is by no means weak. great education on both sides too, again med is a little better. good pathologies, varieties of patient population, a pretty good amount of subspecialties and no fellows to compete against. more importantly most residents seem quite happy, and get along well with both categoricals.
it's about 3 hours to chicago, so not that close. i wouldn't really consider it close to chicago. medical college of wisconsin (awesome MP program) is much closer to chicago, maybe 1.5 - 2 hrs, or a little more in traffic. anyway milwaukee has much more of a chicago feel than peoria, if that's what you're going for.
so far ive only interviewed for MP in peoria and milwaukee, so i don't know much about the chicago programs themselves just yet. anyway, good luck dude. hope this helps.