This seems biased. The X360 has some very excellent games (well, at least according to reviews) while the PS3 and Wii have more like mediocre games.
PS3 with GTA4, Uncharted and Ratched and Clank is my choice. CoD4 could also work instead of some of these games. I don't like M$ but GTA4 is a decent multiplatform game and Mass Effect sound interesting. Probably nothing excellent but still good. The first Halo has seemed very boring to me, Halo 2 was worse and Halo 3 is said to be just Halo 2 HD or something like that. In any case, I don't want Halo. Wii needs a decent action game so that I would get it. SSBB doesn't interest me. Super Mario Galaxy might be good but does not save the Wii alone. Zelda cuold also be good but can't really say. Never played.