The Niles rvl-6 doesn't have remote controlled individual cahnnel on/off... i asked their tech help guys, and they acted like I was from Mars for wanting something like that...
I'm about to install a Xantech 686-10 into a customer's office that does exactly what you want a system to do- individual channels on and off.... It came highly recommended by a fellow forum member
We can do it my way, or we can do it my way while I yell. The choice is yours.