Multi-room streamer (alternative to Sonos)

Bluesound is the way to go, in my opinion.
You can add an outboard DAC to increase fidelity- I use an Ayre Codex.
For the money, Bluesound is hard to beat with regards to connectivity.

Bob

Thanks Bob!  I was considering the NAD M17 (since the main system in question is used for watching movies and such.  We currently have an Anthem AVM60 and it's decent, but I'm sure it could be better.  The M17 would integrate everything nicely.

Today’s announcement from Sonos is going to impact how people budget and deploy multiroom streaming speaker systems...

I've just started with a Roon ecosystem and so far so good.

Seems like 'Chromecast Audio' would suit your needs, and it's very inexpensive.  A minor detail is that it's not being produced any more, but you can find them (even new) on the usual sites.  A bonus for tweakers is that if you don't like the onboard DAC you can use optical-out to your DAC(s) of choice.  CCA is also a cinch to use and expand FWIW. 

I don’t know if for multi room options anything sounds better than 
Bluesound, which will play High Resolution recordings.  As usual with them the DAC is the weak link.  For a while I was had resurrected an old DAC, a PSAudio DLink III, for one of my HT systems, so the Node2 in that system sounded better than the DAC in the 20 year old AVR, but when I upgraded the receiver I couldn’t notice much of a difference so out it went.

Thanks for the replies everyone.

erik, I'm still not 100% sure what rune actually is.  It kinda sounds like Plex?  Basically a front-end interface for accessing music?  My biggest issue with roon is that it doesn't support spotify, which means I'd be maintaining my own music database, or hunting around.  I admittedly haven't tried Tidal yet, but I'm not sure it would have everything I want, my music taste is all over the place, and I feel like I would have to supplement.

archguy, I've tried chromecast in the past and they were nice and sounded fine, BUT, room linking and zones was awful.  maybe something like roon as a front-end would solve this, but we have an open floor plan house (which I think is the main issue here) so having 2-3 zones linked gets a bit tricky, and was a real pain to setup.  I've been trying to abandon sonos for some time now, and I actually sold everything, tried chromecast, and ended up going back to sonos again.

photomax, I really hope a bunch of people dump sonos based on the last announcement.  for the past year or so, it's been completely unrelaible and garbage.  I was ironically one if the early adopters (and even a large US dealer before they went 'mainstream').  In the early days, it was amazing and always worked.  But now it's so bloated and unreliable, I find myself playing significantly LESS music with it, because it's always a pain and it doesn't always work.  After 30 seconds, it will lose connection, skip, or stop responding, etc.  I've been on the phone with them several times over the years and they can never seem to fix the issue.  Sometimes it starts working again, but then a new update breaks it (and the updates are often and mandatory).