Well, the headphones must be working - you got a real nice balance going here. I love the new voices around 1:30 (and again, at 2:49), kinda wishing they came in earlier.
Shortening the intro and working on some pitch issues around 3:17 (dissonances didn't resolve) would be the only things I would change.
Please contact me if you would like to use this in a project. We can discuss the details.