Minimserver compatible replacement for two Sonos Play 5s.

[simbun]

I understand your dislike of Sonos, I'm in the same boat and I'll never buy another, but unfortunately it leaves you with really limited options (if UPnP is a must).

I just wanted to make sure that you knew Sonos does everything you've asked (working with MinimServer, BubbleUPnP server and thus the Linn Kazzo app I believe) except for playing Hi-res audio natively, but MinimStreamer will help you out there.
In regards to the update process; it is infuriating, but it's never stopped working as a UPnP renderer for me, only if I go back into the Sonos app does it force me.

Apologies if more Sonos advice was the last thing you wanted to hear.