If you guys haven't tried Red Steel 2, it is phenominal. The Motion Plus tracking for sword play is awesome, there is an upgrade system for guns, swords, and special moves, decent story, intense action.
I love Smash Bros Brawl for Multiplayer battles, but rarely have the opportunity.
Goldeneye 007 is also a really great reboot of the old N64 game.
Donkey Kong Country was the best put together side scroller I've played in a while, very creative visually and in the gameplay.
I also have my NES, SNES, N64 all hooked up to play. I still have my Gamecube too, but no reason to have it hooked up with the Wii there.