You really have no preference? If there is something keeping you in the South, I'd eliminate Penn State. It would be hard traveling down South with a Penn State degree upon graduation.
Hmm...Do you want to do big law? UM does really well in S. Florida even though its not the top school in the state...And its nice weather too, as long as you like diversity:)
I just glanced at the rankings, it seems like Baylor(53) is the highest, then Miami(70), then Penn(91). If I had to make a decision I'd probably go with Baylor because of the ranking and half-tuition.
Have you visited the schools yet? I bet that would help the decision process.