I use Chromecast Audio units for my pre-internet/wifi gear (discontinued but last I looked still some units available on ebay). I'd much rather use wifi than bluetooth in the home, it's getting better every year but when you can stream via wifi why bother? I don't plan on ever entering the Sonos universe, seems far too limited. I have older Denon avrs but doubt I'd find much use for the Heos. My outdoor speakers I use zone 2 off my older workshop receiver (and am listening to Spotify that way via the Chromecast Audio thing, using my phone as remote control, as the Spotify servers deliver right to CA unit rather than use the phone's BT). I do have a Tao Electronics bluetooth receiver for my truck, and it can easily be attached to a receiver but....