All in One Solution for Streaming

I'll second what @fastfreight is saying- do you really want speakers in the dining room? speaker cables for guests or pets to trip over? Sonos are awesome, just use your phone to control, either using Roon from the main system or just your phone apps. We have had some issues connecting them at times when wifi modem changes, but once connected it works flawlessly.

A nice small, discrete room filling sound and no-one will know where the sound is coming from. We have a Five and it amazes me the bass that come out of it. I have also been in restaurants with a few of the little older style One's mounted in the top corners and me being an audiophile could not believe they did not have the sonos sub with them somewhere. I see they even have in wall and ceiling speakers now if someone wanted to do a little more permanent work. 

Do not forget Hegel! Their integrated amplifiers have good DAC's and onboard streaming They can do Spotify, Tidal, Roon, AIrplay, etc. 

Hegel H190 which can be found used for $3,000 or less, I do not own one....but generally highly thought of 

I'd also suggest looking at Hegel based solely on the fact that the previous owner of my T+A PA 3100 HV settled on the Hegel 590 because he wanted to move to a one-box solution. He thought Hegel competed well against the T+A sonically, which is no mean feat as the T+A is truly extraordinary. 

I know it's just one (two?) persons opinions, but that, along with the fact that Harbeth powers their speakers at shows with Hegel, I think speaks volumes for the brand. 

Have to agree on Hegel H190.  I use one as my summer amp when my tube amp makes the room a little warm.  I use a WiFi booster with an Ethernet plug on it and run the Ethernet cable to the Hegel.  Sounds great to me.