I'll be honest, while I liked Dawn of War II, I can't even remember the game's score. Never mind. I'll refresh my memory by downloading the soundtrack for free.
If you head to the game's store page on Steam, you can pick up a copy of the entire soundtrack, which aside from having a lovely cover is in high-quality 320kps quality. Nice touch.
It's available in a 193MB .rar archive file from here.