I like your taste Veknoid, many great choices. Gusty Galaxy, especially, that song defines the Wii for me. If you don't mind, I'll post my list too.
10. Title Theme - Age of Empires II
9. Main Menu - Metroid Prime
8. Stardust Speedway Past - Sonic CD
7. Aquatic Ambience - Donkey Kong Country
6. Main Theme - Killer Instinct
5. Proto Man's Castle - Mega Man V
4. Zanzibar Breeze - Metal Gear 2: Solid Snake
3. Katamari on the Rocks - Katamari Damacy
2. Main Theme - Metal Gear Solid 3: Snake Eater
1. The Great Sea - The Legend of Zelda: The Wind Waker