I love The Extreme, it's one of my favorite songs in the game. I like how it pays homage to the older battle music (the "da-da-da-da-da-da-da-da" that returned fully in Final Fantasy IX).

I'd like to mash-up The Extreme with J-E-N-O-V-A one day as I find them quite close in terms of music. I don't have the talent just yet.