My opion of the Ps3 after my first day playing it is....

[Ssyn]

I'd go with AC or COD4; GTA 4 isn't as great as it was hyped so you might be disappointed. AC is very fun other than all the assassinations are similar other than the setting of course. If MGO isn't your thing than COD4 is a very good shooter for online play; don't expect a good single player.