My vocals were receding deeper into the background with each version, so I'm pleasantly surprised to hear more of myself in Rex's edit. I also like the shotgun blast sound he makes at the end, which I interpret as a metaphorical attempt to put a sick dog out of its misery.
He'd love to hear an asynchronous podcasting choir that had the sense to exclude the five of us:
... this is a great idea for some serious choral folks and acapella enthusiasts (translation: people with talent) to experiment with. Post the music arrangement and some MP3 masters for each vocal part, and then invite folks to send in their part.