I need help deciding on a couple of games

Ok I need help on buying which game for the 360. I can only buy 1 now tho.

1) Crackdown - I like the coop and Halo 3 beta (Feb 20th)
2) NBA Street homecourt - I love basketball and im good at it. this is just icing on the cake (Feb 20th)
3) Dance Dance Revoluion Universe - I love DDR and I also need to lose about 5-10 pounds so this would be good (Feb, Something)

4) Halo 3 - Its halo 3 'Nuff said (TBA)

Help me

Get some exersise... If I get fat on my body, I can't stand to sit down and be lazy without working out for 2 hours first...
DDR is NOT the way to go... Do not fool yourself into beliving that having fake seisures in front of a shiny screen will shape your body... Lift some weights, run for 20 mins a day till it's gone.
okristian