Though I'm not sure what I definitely want to do my research in, I wanted to have logic or set theory available to me wherever I end up. So, I mostly applies to bigger departments that have lots available (as opposed to Carnegie Mellon, &c.) That said, I applied to - Cornell, Wisconsin-Madison, Illinois - Urbana-Champaign, CUNY Grad Center, WUSTL, Dartmouth, Kansas and U of Buffalo. Like I said, most of those are bigger departments, so I'll have options.
I've only had one class in set theory, one in logic and one independent study in Forcing; of the 2 standard classes I enjoyed the set theory course more, but I'm sure logic is really cool too - model theory sounds especially interesting.