Super easy fix. There are many HOURS of classic big orchestral fantasy music in Syrinscape.
Simply do this:
Start a mood with the music you are not crazy about
Stop the D&D Battle Music Element
Go to a SoundSet that has music you love (a good one might be "Hell" = it has some of our most EPIC music)
Start the top element there and adjust level to taste
Go back to your original SoundSet and save yourself a custom mood
That's what's so great about Syrinscape = totally customizable to be perfect for YOU!