Get Twilight Princess, invest some money into Virtual Console games (like the original Paper Mario and any SHMUPs or other 16 bit games you'd enjoy) and then go to town on some cheap Gamecube games. That'd be my approach, anyway. There are plenty of decent Wii games, but so many GameCube treasures that it's worth buying them cheap before they disappear and using your Wii as a prettier GameCube until Prime 3, Brawl, and Mario Galaxy hit.