You are facing a dilemma... that probably means you like puzzle games.
You have asked us for help - a clue that you seek online involvement.
Seriously, without knowing what kind of game you want to play or what you think appeals to you, it is pretty hard to make any kind of recommendation.
So... Without knowing more, I'd day the Wii is the best for you because that's what I have.
edit: Welcome to Wii Chat.