Xenoblade Chronicles for the Wii has one of the best OST of recent years. It is a great mix of orchestral, electronic, and rock rhythms. I HIGHLY recommend you give it a listen. For a good taste of the OST here are a couple of the best tracks.
https://www.youtube.com/watch?v=y6UhV3E2H6w- Gaur Plains
https://www.youtube.com/watch?v=oGw5kwHl_LU- Mechanical Rhythm
https://www.youtube.com/watch?v=7OxpAqDc4JE- Main Theme
https://www.youtube.com/watch?v=gQnY7L8ucCk- Confrontation with the Enemy
IF you're interested, I have files of the entire OST. It is pretty impossible to buy.
