xBox360.  Why?  Because, it seems like a much more powerful machine than the upcoming next-gen gaming consoles, it'll have Halo 3. ()  Plus, on top of that it already has free online xbox live capabilities, which, I think is very cool..  Also, most of the launch titles look very promising if I may say so myself,  (Oblivion, Perfect Dark Zero, etc.), so pretty much you're looking at an awesome system, if I may say so myself again XD.