More of you people need to play Baten Kaitos.

Behold, one of the greatest normal battle themes in any RPG ever.
(SPOILER)

And there is a ridiculous amount of awesome diversity in the boss themes


Condemnation of Darkness

Chaotic Dance


Rumling of the Earth

And the coup de grace
FINAL BOSS

Although I think this is hands down the single best and most beautiful track in the game:


People always yap at me that "GUILTY GEAR HAS THE BEST FIGHTING GAME MUSIC EVER." Well the GG guy was the one did the guitarwork for Baten Kaitos. Also Star Ocean The Last Hope.