I've seen the grids and the calculators, but I'm wondering if my GPA is worth any more since it came from the U of C.
not really, chances are you will fall right in where everyone else with your LSAT/GPA. You're a splitter, so acceptances/waitlists/and rejections might vary a bit, but don't expect a boost from your school. Without having looked at LSN in the past year or so, I'd say NYU, Columbia, and Penn are reaches, Northwestern is a reach if you don't have any work experience, and you'll get into Boston and Fordham. For your best chances, get all your essays, recs, etc. ready now so as soon as apps are up you can send it in.