Xbox has better versions of games than PS2 and Gamecube? Are you serious?
Metal Gear Solid 2 is FAR better on the PS2... better controls, no slowdown, etc...
EVERY SINGLE game I have played on the Xbox has had massive slowdown.
Halo, Jet Set Radio Future, Gun Valkyrie, Tony Hawk 2x, Amped, Sega GT, Munch's Odyssee, Splinter Cell, Metal Gear Solid 2: Substance, etc...
ALL have had slow down so much that it is laughable. The end of Halo was almost completely unplayable from the massive slowdown. Xbox may be a touch more powerful than the other systems, but not much at all. And in a couple years it will be a moot point anyways when the next generation of systems comes out. The simple fact is that the Xbox has the worst controller, most slowdown, and worst games.