Best original sound track for a Game?

Could it be Snoop Dogg in NFS:Underground 2, or maybe GRAW?

Forza 2 has some good tunes in the menu'sangryfodder

Definitely agree, Forza's music is good all around. Katamari had some sweet music too though. But I'm going to have to go out on a limb here and say Rez = Best Video Game Soundtrack of all time. lol

Madden 2006!

JK

For ANY game?

Mechwarrior 2 (PC) or Shadow of the Beast (Amiga)

On the 360? Nothing really stands out as spectacular.