I agree with "How it Ends" by DeVotchKa, "Young Men Dead" by the Black Angels, and "Heron Blue" by Sun Kil Moon.
However I am surprised no one has posted this yet, but "Dead Man's Gun" by ashtar command.
http://www.youtube.com/watch?v=HkAvVqjbUG8
Also "Feuer Frei" by Rammstein, "Foggy Mountain Breakdown", "Deadly sinners", or "God's gonna cut you down" would be pretty sweet.
This is the song I would make a final stand to, it is pure awesome.
http://www.youtube.com/watch?v=liq_wYFkMoU
My apologies, I literally joined the Escapist today, so It may take a while for me to learn how to embed songs...