Yes, that's exactly what I suggest. Considering the capacity of your NAS you should be able to find enough space on it to accomodate your music collection, right? This is how it works for me: all my music (and videos) is on the NAS, which is accessible from my home WiFi network. I have 3 TVs and 3 sound systems in my apartment, but as one TV and one sound system is in my kids room let's disregard that and count only 2. Each TV can play videos from the NAS via WiFi network, and the same goes for playing music - in the living room I have RPI running Volumio and in the bedroom I have HEOS Home cinema. As both are UPnP/DLNA capable I can control them either via my Android phone running Bubble UPnP app or via my notebook running Linn Kinsky app. BTW, not only it works fine but Bubble UPnP app is clever enough to pause the music when I take up the phone call.
