What music do you associate with the series?

For me it's Ne Obliviscaris (this song even says "Rising red..."), for its fusion of classical beauty in its violin playing and complex bass melodies, with the kind of brutality you'd usually expect from something more primal. The crusade imagery on Exul adds to this, the galloping percussion brings to mind Darrow's army on his holy war against Gold in the Iron Gold saga

As well, Kimaera's Imperivm, for a similar reason, but even more so with its roman imagery.