Actually, I bet Sunstreaker is vain enough to do guard. And... I was rather hoping Sideswipe would be a tenor... >_<

The image in my head of Skyfire and Starscream playing flutes makes me lawl, hard. But not as hard as the image of Megs and Prime having a tuba duel...

Powerglide would probably be a boner- er, a trombone. Huffer should play alto sax, though I'm not sure why this fits so well in my head... Bumblebee would probably be the only boy in the clarinet section. (There's usually one or two.) I don't know about the others.

Poor Prowl. That'd be hilarious...