Just about everything that you guys have already mentioned is excellent. I'll have to think about it and add a few more. MUSHA is one of the only games above that I do not own, but I would love it. I would agree that it is one shooter with an insanely awesome soundtrack that defies all laws of the SEGA Genesis. My jaw dropped when I first heard it.
We actually had a game music thread in the forms where a lot of people posted favorites. Maybe Tempest can dig it up.
Edit. Fun fact. Toshiaki Sakoda was the composer of MUSHA and many other Compile (not Heart) titles that also rocked, such as Devil's Crush. He has a YouTube channel and always has nice responses to fans.
http://m.youtube.com/user/erinaz1000