Im thinking of going with either the Nuvo Simplese or the Russound 4 zone system. Both are around the same price. Anyone have a recommendation for which one? I was just planning to put one source to show the home and let the buyer add more sources.

That's funny about the Chromecast, That's what I have setup in my own house right now until I get my RTI system done. This was before they came out with the audio only Chromecast. I have them setup with an HDMI audio extractor and a mini amp for each zone. the only downfall of that is no "party mode" Works pretty good for the cost, but would NOT recommend installing in a clients home. Better suited for DIY.