Music and writing

In past interviews, people have asked me if I listen to a certain type of music while I write.  My response was always no.  I love to have it completely quiet while I write and could never understand how anyone could write otherwise.
Lately however, I have been struggling to find my special place in my mind where I go when I write, and decided to try and have a little 'quiet' spa like music playing in the background.  As I pulled up my manuscript, I instantly fell into a routine, quickly finishing a chapter, and writing several more pages with no problems.
That is when it struck.  I realized my writing had changed to match the type of music I was listening to.  This particular part of the story required Chloe to perform a certain type of magic.  When I thought about this scene a few days earlier I struggled with how I was going to get her to do this. It was going  to be difficult for me to describe to the audience how I saw her task in my head.  While typing, I could hear the calming sound of chirping birds, and babbling brook, and before I even realized it, I had typed the entire scene so beautifully it made me smile.

So now I realize why some people need music to help them write.  I will defiantly need to find a type of music to help me write the upcoming battle scene with Jacan.  So I need your ideas, what type of songs do you think would help me write a big battle scene?