Now I think this poll is for best console, meaning which is more advanced, or could do the most things. That is a close one between PS2 and Xbox, but since Xbox will end up costing you less in the end (dont have to buy PS2 adapter, HD, keyboard, etc) I'm going to go with Xbox.
If we are talking games that is a very hard one. While I enjoy playing Eternal Darkness, Super Monkey Ball, and Resident Evil 0 on GC I like to play GT3, GTAs, DMC, on PS2, and I also like to play a wide array of games on my Xbox.
I guess Xbox would win games wise but it also has the upper hand because whenever I buy a multiplatform game I buy it for Xbox.