Should I get a PS3 or a XBox 360?

I have a ton of friends that have a 360 but most, if not all, the good games for it are rated M. I would probably only be able to get Gears of War since a lot of my friends have that. On the other hand PS3 has all the same games as 360, more adventure style games and with the new Ratchet & Clank and the New Jak and Daxter coming out, I don't know which one. Also I already have a PS2 and a Wii