I also have an Xbox360 hooked up to my 5.1 setup. Sound is excellent and immersive. When I play Fallout 3 and something makes a noise in the distance coming up fromn the surrounds, my cat gets spooked every time thinking there's something in the house!

My new system: M80s, VP-150, EP-350 and QS8s, Denon AVR-889, Samsung BD-P1500 and XBox360