PS3 all the way. The features of the PS3 are equipped for the future with more then just gaming , while Xbox 360 is just stuck in the gaming, unless they come out with some future xbox system, it wont improve that much.
PS3 = Cheaper Blue-ray player, better graphics, and has superior specs that those of the X box 360, it's the best console in terms of processing and graphic power, has more potential for more realistic, bigger, deeper games full of content. and besides most X box games are on the PS3 too so go with the PS3, it's the best choice, but that's just my opinion, If you want a real facts you can always Google something like PS3 Vs. X box or just compare top games and their technological potential