Best music on Playstation 2? I don't really know. I don't drool over game music like some people do. There were a ton of people that bashed Legend of Dragoon for it's music, and I thought it sounded great. Whereas, some people freak out over Vice City's music, and I find it average, considering that absolutely none of it is original material.

Best music on PS2? I'll say Legacy of Kain: Defiance, simply because the Soul Reaver theme is fucking amazing, and they use it in all of the perfect places.