A year ago my friend asked my help in making this. We have taken the wraps off the new cloud jukebox from Fon: https://www.kickstarter.com/projects/fon/gramofon-modern-cloud-jukebox
The first few are available to Kickstarter backers. You will be able to stream your Spotify to any sound system in your house and use smartphones as the remote controls — in July if you back it, later if not.
In the time it took me to fix a typo, already many are gone.
Amol