It is possible to connect your ps3 controller via bluetooth or USB but it will appear as a standart gamecontroller and you have to configure buttons by yourself. The Xbox controller has the advantage, that the buttons are pre defined just like on the XBox and the UI will show which button you need to press just like on the Xbox. I bought a controller myself even if i doesnt got a xbox just because its very comfortable to use. I just played Warhammer 40k space marines, deus ex, operation flashpoint 2, Fallout and many other Games with it. The Controller has really paid off.