If I had to choose between the two, I'd say Xbox 360. I only have a PS3 right now, but I've had an Xbox 360 and I miss it. The Xbox 360 is backwards compatible to use Xbox games while the PS3 is not. Also, every Xbox 360 game has achievements whereas the PS3 didn't backlog their games once they implemented the trophy system. I'm an achievement/trophy whore, so it actually matters to me. When I rent games for the PS3 I make sure there're trophies to earn. Otherwise, I won't get it.