Why not add another streaming device? (7th device active right now) Chromecast Audio
I have really been looking forward to this one though. Right now I depend on youtube playlists to play music in our main room. Since moving to FireTV devices I cannot use google music, which is my main music streaming.
If you want to be able to send audio via wifi to almost any speaker / system this is it. You cast to the Google Chromecast Audio that is connected to VIA 3.5mm audio / RCA / optical all through the same jack. It is powered by a micro USB. You cast to it to any device that has those connections.
It works just like a Chromecast, but is for audio only, so no youtube playlists. It works with most streaming audio apps out there. The sound and signal strength is better than any streaming device I have currently. Bluetooth works for most, but this is such a step above. If you have multiple ones in your house they can sync to share. Imagine every sound system working in unison.
tl;dr: plug puck into any speaker, and you can stream music from phone / computer / tablet = awesome. Bluetooth speakers, your grandmas receiver, your TV, headphones, etc…. $35