I don\'t know.. but whatever it is, it\'s going to be a TrackBall. I\'d hate having to go from slumping over a desk to slumping over a coffee table just to get enough room to set my Keyboard and Mouse. With a trackball, I could just sit the keyboard on my lap and set the mouse down beside me on the couch and acutally be able to relax while playing a game.
Right now I\'m leaning towards Logitech, but whatever is cheap and of decent quality is the one I\'ll get.