I think Miami has a chance if Wade is healthy, just because he is such a transcendent talent. Keep in my they addressed their shooting shortcomings to a degree by acquiring James Jones. Mario Chalmers is a decent prospect at the point position. Marcus Banks will also be better in a system like Miami's due to Wade handling a decent amount of the playmaking and ballhandling. I don't see them as a 50 win team but 40 is not out of the question.
Remember, Boston started last season with the big three and then Rondo and Perkins in the starting line-up, neither of whom you could call sure things.
At the end of the day the one thing we can count on is one or two teams underperforming expectations - either because of injuries or some other reason (i.e., Chicago last season) , and one or two teams exceeding expectations (i.e., New Orleans, Portland, Philly, etc., last season).
The Hawks have a good chance at the playoffs for the second year in a row as long they get something from Bibby or Acie.