I tried the Wii, and was less than amused by the Wiimote. It's clunky and doesn't fit comfortably in my hands, since I'm about the size of the Under fucking Taker from WWE, and the damn thing is so small I often have trouble using the buttons.
I'm much more comfortable with the 360 and PS3 pads. Less clunky, less gimmicky and I can actually puch the right buttons.
The fact the Wii has exactly TWO titles that hold any sort of interest for me doesn't help at all. Besides the upcoming FE and SSBB, the rest is uninteresting crap for me. OTOH, I've spotted several titles for both 360 and PS3 that spark my interest.
Nintendo's problem is always the same. A cheap console means jack shit if the games on it are boring crap. That is what killed the GameCube, and that is what, in the end, will kill the Wii, unless they wake up and get some big names on the thing. They can't survive on first party games alone. End of story.