Another question I have is what do I have to buy to control the various other speakers around the house. I will be buying the 770 and using the 2 extra channels(HT system will be 5.1) for my 10 sets of remote speakers. There will be keypads in each room to control volume and whatelse I'm not really sure. Is there an off switch on each keypad or does the amp constantly transmit music to those various units and you just adjust the volume up and down. If so, is 200 watts for 20 speakers enough.

Obviously, I haven't thought this part through yet.