What custom music, and from what sources, if possible, do you use in your custom maps?

I tend to use the Star Wars albums as a benchmark, filling in missing bits and pieces with anything I can find (IE I can extend the Battle of Coruscant suite from RotS Soundtrack). I even have used KOTORII's "J'ekk Tarr Tunnels" track once.

the only music i ever used in a map was the final fantasy theme by apocalyptica