Hey Che. I can offer you my humble opinion since I was raised near UM and have been looking in that market for quite some time. For the first year of law school you will want to live as close to the school as possible. Condo/apt complexes like Valencia, Cloisters, Gable's Court, Miller 67 and University Inn are EXTREMELY CLOSE. There are more beautiful areas that UM students live like Brickell, South Beach, etc. HOWEVER, you must realize that with traffic in the area, 15 minutes on Mapquest can EASILY be 30-45 minutes during bad traffic times. I looked at an apt to rent about 12-15 minutes away and the two 1L's that currently live there expressed their regret for not living virtually across the street from campus for the first year. It is different for the 2nd and 3rd year when you will possibly be working downtown and need less time on campus.
I'm sure a few people on this message board will disagree with my opinion but, from what I have gathered, closer is better.
Again, if you are looking to move w/i the next month or two, I will be renting from Valencia South Miami or Gables Court and would like a 1L for a roomate. Please let me know.