I dunno why people cry about the Wii's "sucky" controller. I've been playing RE4 Wii Edition for the past 2 weeks now, and the controller is awesome, a lot better than a joystick for aiming. You know why the controls suck for certain games? It's simple, people actually have to use their brain while making gameplay fun on the Wii...it's called creativity, something the industry forgot a while ago. Maybe you guys could throw some creativity into the selection when Nintendo puts out WiiWare.
Oh yeah, the Wii's VC is friggin awesome, that and you have the library of old GC games to play, maybe catch up on the Metroid Prime series in preparation for the new one... Gamestop has GC games for cheap now I bet (I haven't checked into them since I already have a rather extensive library of GC games.)
So, my vote goes to the Wii...I don't have a 360, I will say the 360's controller is amazing, it fits in your hand rather nicely. Of course the graphics are better...that's its strongpoint. but if you're going for something out of the ordinary, the Wii is a good choice. Graphics aren't all there, but hell you've got a PC for eye candy
I've had a blast with mine, I've got RE4 (Revamped Wii controls), WiiPlay, Super Paper Mario, and I had Trauma Center but the disc was screwed up so I had to take it back. I also have Twilight Princess, and it's fun...I've just been occupied with other stuff right now, I'll finish it in the coming weeks.