Man I think you´re better off staying on VEGAS or trying premiere. AE is not an editing app and that would be a pain to sync a whole video in it.
Only the thought of going to a RAM preview everytime the board hits the ground (or a ledge…or maybe a body on the ground) makes my brain hurt.
The question is: Is this trip really necessary?
You can try to do it visually by selecting the music layer and hiting LL. Then looking at the sound peaks and sincronizing it manually. But then again it would be a pain.
I would stick with a editing app for that.
Well those where my two cents…more like one but anyway.
Cheers and good luck!
adriano.