In terms of your problem logging in to Qobuz, your firewall may be blocking their site. I’ve had this problem and had to have Netgear tech support unblock it in my Nighthawk Wifi 6 router. My thoughts are that with a tube based DAC you probably won’t hear the difference between the lower noise floor of the N200 over your NUC, especially while using ROON because the tube noise is above the noise floor of the least capable source, namely the Intel NUC. I recently moved from a similar setup, got rid of ROON which has it’s own SQ issues and am now using a high quality streamer/server made by NOVATRON that has built in storage and runs on a linux custom processor and has exceptionally low noise characteristics, a highly accurate clock plus exceptional physical build quality with much attention to detail, yet only costs about $2K . This allows my (slightly) below premium grade Gustard X16 SS DAC (connected by USB) to really strut it’s stuff. One would not have guessed a streamer/server could make that much difference but it really does.
750$ Intel NUC vs $6000 Aurender N200: I don't hear the difference
I finally plunged into the source is as important as the DAC belief that is quite prevalent here and decided to test out Aurender N200. And given I have a very highend DAC, thought if the N200 pans out I would go for the N20 or N30.
I was expecting the N200 to blow away my Intel NUC which is 10th gen, core i7, 8GB and running Roon Rock BUT I am switching back and forth between USB playing the Roon Rock, and Co-axial playing Aurender N200, and I don't hear much of a difference maybe a hair, or not even that.
A few caveats: 1) Roon Rock is playing Quboz, N200 is playing Tidal (I am unable to get Qobuz login to the N200 for reason I don't understand).
2) I am comparing Coaxial on N200, USB on Roon Rock.
Caveat #2 can be ignored because I don't hear a difference between Coaxial and USB output of N200.
So either this is an "Emperor has no clothes" moment or I am missing something big. Any thoughts on what I might be missing before I send this N200 back to the dealer on Monday.
Rest of my system: Nagra TUBE DAC -> Accuphase E-650 -> Devore O96 and all Acoustic Revive wiring.