US News rankings are biased in ways that hurt the U. Miami Law; here's one I would guess is biased in our favor: 2010 Super Lawyers U.S. Law School Rankings by Super Lawyers magazine. They say we are #20 in the country. Would it were so.
I suggest you split the difference between the 71st ranking at USN and this one (71+20)/2 = 45.5. That's probably closer to the truth than either of the other two numbers.