Yes it matters and personally I think you should stay separate, doing so will allow you to upgrade in stages. A new dac now and then down the road replace the Sonos.There are several threads about the Auralic Aries Mini and Blue Sound Node2 both would be a nice upgrade to your Sonos. Do some reading there is a lot to absorb here!
Music Streamer Quality
This may be a dumb question but does the quality of a music streamer ultimately affect the sound? So here's some detail. I currently have a Sonos music streamer fed into a Simaudio Moon 300D dac. In the interest of having higher quality sound I could upgrade the dac or I could buy a dac with streaming capability such as the Simaudio 280D. I'm looking at a R2R ladder dac but would have the same Sonos feeding it. Does that make more sense than something like the Moon device? I appreciate an comments.