Regarding multi-room - the house we bought came with speaker terminals in the basement and the living room. I don't know what quality the wiring is in the wall though. There is also the problem of having my CD collection strewn throughout the house like leafs blowing in the wind. I prefer a system like Sonos or similar for multi room, but of course that is much more expensive...How does A/B switching differ from amps that offer "multi-zone" specifically, such as the NAD C725, does this just mean you can play two different sources in two different rooms?