Universe at War, it was a kinda overlooked game but it had excellent music. Each of the 3 factions had different sounding music to them. Rock, Electronic, and Orchestral.
Here's a download link to the free OST: http://www.gamefront.com/files/uaw+ostzip/;9300216;/fileinfo.html
Actually, wait, if I remember correctly you used a song from this game in the Civil Protection video Morning Patrol. So sorry if you already know this one.