I wouldn't discount the possibility of using a bit of music from somewhere in the PT just because it's from the PT, or leaving a section musicless. Some of the greatest action scenes have no music; the chariot race in Ben-Hur is the most obvious to me, and of course they made the same choice for most of the pod race in The Phantom Menace. Cueing the music part way through a sequence (like they did in the pod race) is an excellent way to heighten the excitement. If you can't find appropriate music, please don't cut the sequence.