I love topics like this. Why? Because I can just link this and the discussion is over:
When I saw a link, I hoped it was for a track from that game. I was not disappointed. I personally really like Engage the Enemy, but that could mainly be because it plays during all of the most dramatic and memorable scenes. Zanza is pretty awesome too, once it gets going.
As for best soundtrack from any game ever, here are some of my choices:
Final Fantasy VII Phoenix Wright: Ace Attorney: Trials and Tribulations Okami Xenoblade Chronicles Persona 4 Chrono Trigger LoZ: Wind Waker Tales of Symphonia Banjo-Kazooie
I'm sure I'm missing some though... --- "A man who lived in dreams. That's who he was."