Travel to Miami

Hi.
I have a trip planned from Warsaw to Miami for November 22–30, and seeing an NBA game has been a huge dream of mine. Unfortunately, following yesterday's schedule announcement, the Miami Heat aren't playing during my stay—except for the day I land (and the landing time clashes with the game's tip-off). I don't have much time to see everything in Florida, so I’d love some advice on what’s most worth doing or seeing.

I have a few options to choose from:

1. Take the train to Orlando for the game against Detroit (I’m seriously considering this) and stay overnight—I’d like to know if Orlando is worth the time.
2. Go to Key West instead of Orlando.
3. Skip the previous two options and take a ferry to the Bahamas. Unless you have other suggestions? I’d appreciate your advice. Also, I’m not sure if 7 days is enough to see everything in Miami. Thanks!