Just got this Marantz ND8006 to compare against my Oppo 205 as a streamer and DAC. I have to say, I was rooting for the 205, but this thing is just much more musical. I will admit it depends on your personal preference for clinical accuracy (205) versus musicality (ND8006). I am surprised at how much better the Marantz sounds... I’m listening to the Marantz streaming Tidal from the HEOS app versus the Oppo as a Roon endpoint and I very much prefer the Marantz. However, the HEOS app absolutely sucks compared to the versatility and usability of Roon.
I believe Roon will be coming to Marantz soon, and so I can make do until then.