I won't be doing the electrical but I imagine the electrician will use armoured cable to avoid any miss fired nails puncturing it. If this is the case and I can't twist it is this install doomed?

All four walls will get moulding. I don't see why we won't be able to run speaker wire down one side and power down the other. I think that's the better way.

But thanks for the idea. I'm going to mock up a test and see if I can tell the difference.

Craig.