moderately pro Wii
Ambivalent towards PS3 and Xbox360.
Non-Wii games I want to play:
MGS4
GT5
Viva Pinata
.... aaaand that's about it.
Now that GH4 is coming out for Wii, I'm not tempted to get Rock Band anymore.
If I were to get a second system, it would probably be PS3. I'd have to want more than 2 games to make it worth the investment.