Guitar Hero / Rockband - forget the costs its awesome!!!!!

Theres a downloadable game on the Wii that you might like (a friend of mine works for Frontier games who helped design it) it's called LostWinds. It was voted the best "IP" at a UK games award ceremony in brighton. It's a brilliant game and really is a little different.
LostWinds Nominated For Develop Awards - WiiWare World