XBOX vs PS2 vs Gamecube I am thinking of getting one of these for my family, We will be playing on a large screen with a dolby 5.1 surround setup (and a very MANLY 15" Velodyne Subwoofer!!) I am interested in the audio, mainly, that sounds come from behind as well as in front and center. and BOOM! Do all of these units offere games with surround sound? If someone is behind me shooting, I want to hear it from the rear speakers. I don't want just left/right seperation. Also, I have a 6yr old and a 4 yr old. If they are lucky I will let them play too. First person shooters are fun, but I also like strategy games.