on the topic of NBA live 09, if anyone hasn't played the demo yet, I suggest you do. From my perspective and the opinions of others, EA have really stepped it up with some great features (particualy the DNA 365 and NBA academy). The demo is great, there's a bit of a learning curve with the lockdown defence and pick n roll controls, but great when you pull them off.
While 2k9 havent released a demo yet (should be soon withing a week or two) I think Live will definently give them a run for their money.