Would a stand alone dac help, and how much?

 I’ve asked this question before, but I wanna see what kind of answer I get now. I have a Sonos connect to stream directly to Bryston  equipment. I use the dac  in the Sonos, and plug analog into the Bryston  preamp. Would it be better to buy a stand alone dac to put between the Sonos connect and the preamp? 

 Someone before said I should just dump the Sonos and get a blue sound node 2i, no stand alone dac.   I haven’t tried that, however I do like the interface that the sonos provides, I just don’t think the dac inside of the Sonos connect is very good. I’m not satisfied with the sq.  All the equipment is Bryson with the exception of aerial model six speakers and an older CD player with a optical out, which I could plug into a new dac. Any thoughts guys? Or girls? I appreciate any information, I am not very informed on streaming equipment Or formats or anything like that. I simply stream from Pandora, Spotify, etc.  Yes, I need to upgrade the service.  Also, what brands do you recommend?  I can spend up to $1500.  Thanks!