Hmm, good find. I agree that the choir-less version might merge better with the rest of the soundtrack, and it could also help to make it sound less like a rehash of episode III's duel music and more like a reference to it.

Also, I know I've said it before, but I'll say it again... I really think that the scene where Obi-Wan ignites his lightsaber should be re-touched. I admire Adywan's initiative to adress the problem that the original shot had, but I think a better approach to it would be to try and fix the original shot rather than replacing it with a new shot that I felt was not an improvement in terms of how convincing it was.

The problem with the original shot is that Obi-Wan's robe "jumps" when he ignites the saber. It should be possible to fix this with a simple morph, though, along with a couple of other little tricks.