Ciao,
Seeking the web in search of a low-cost multiroom solution, I found volumio.
The system is good, the cost is extremely low, the implementation is easy
I already know and own several PI (got 5 at the moment for different purpuses) and getting a new one for music is fine!
I just seen few errors that I might investigate (with your help of course 
) related to the updates and plugin installation… but nothis complicated
ciao
M