I have three systems in as many different rooms. Office is a 2.1 channel music-only system. Living room is a 5.1.2 AV system which actually gets used 95% of the time for 2.1 music, 4.8% for TV in surround mode, and 0.2% for movies-DVD concerts. Guest bedroom is a low-budget system of miscellaneous used gear in a 5.1 system.
The common theme among them all is Bluesound. In the office, I've usually got my PC running (as I do right now) while casually listening to music on KEF LS50's off the NAD M10. Bluesound app on the desktop for control. When I tire of looking at the PC monitor, I turn off the PC and roll the chair back a couple feet, pick up my tablet and crank it up. Heaven.
If I then feel like getting more comfy to read, I click and that music is now playing on the living room system. Or on both, or all three. The NAD T758v3 turns on and starts playing the KEF R500's as soon as I click.
Only those times that my wife is trying to take a nap or get some on-line surveys done do I need to send me and the music upstairs to the guest bedroom. It's not as good there because the speakers are old, but still enjoyable and I can really play it loud there. The Bluesound Vault 2 there stores my ripped CD collection and I can play that anywhere on the Ethernet or wireless network here.
Overall, it took a couple years to get it this way but I enjoy the extreme simplicity of it all, in terms of operability. Just a tablet or my phone to run it and precious little power drain on the mobile device. No collection of data and transfer of packets when I'm playing my own stored music. I like that.
KEF R500, R200C, R100, R50, SVS SB2000 sub, NAD T758v3 AVR, LG UP875 4K BlueRay, Samsung UN55JU6500F 4K LED TV, KEF M500 headphones, Sony CDP-CE500 CD changer. Office: NAD M10, KEF LS50, KEF Kube 10b, Pro-Ject RPM1 TT w/ Ortofon 2M Red. Guest room: Hafler 300 L-R, KEF Reference Model 100 center, KEF iQ10 surrounds, modded M&K V-90 sub, Bluesound Vault 2.