OK, so I finally got home and have answered some questions myself with the Sonos
I'm not sure why I didn't identify it as the weak link much earlier? Maybe because it is so easy? Maybe because Deezer streams at much better quality than most other content sites and really does sound pretty good?
Here is some of Deezer's propaganda
"Deezer Elite lets you stream music at CD-quality 1411 kbps in your home (compared to the standard 320kbps), but only on a Sonos system"
So, being true to this thread, I came home and put on some good old Red Book CD through the Marantz UD7007....
Talking Heads - OPUS Collection, 2009 Rhino Recordings (for Starbucks) I think their best non-live disc
I played the OPUS CD through the Marantz song by song against the Sonos streaming Deezer's Talking Heads content.
Again I'm still surprised that the Sonos with Deezer even showed up against the Red Book CD and the Marantz, which it kind of did on some remastered recordings, to a certain extent.
But even the best of the Deezer streaming was no match for the Marantz! It was enjoyable but it lacked in every way!
So now, because of the fact that I do stream a lot of Deezer through the Sonos, I looked to see if I could connect better to my system. Sadly the Marantz just has a Ethernet in? Where the Sonos has RCA or a SPDIF dig out. So I'm kind of stuck here!
I guess I need to figure out how to upgrade my Sonos connection, maybe bypass the Sonos DAC in the process so I can use the UD7007's DAC, or find another streaming system to use with Deezer?
One last question, a hail mary really lol Do you think upgrading the RCA interconnects between the Sonos and the PM-11s3 will help?