[Darryl Ramm]

KISS

Let the monitor controller clock from AES/EBU, no need to do anything else beyond how you are using loops sync now.

You could connect word clock out of an Avid box into the monitor controller, up to you, but I'll eat my hat if you hear any difference.

Absolutely no need to throw away money on a Sync HD... ya ain't slinging video etc. so you don't need or want one.