Hi anotherbob, I also love my NAD M33 that I have now had for 4 weeks. I had some connection issues with my IPAD and Samsung Galaxy S10 phone and connection dropout issues in October but the NAD M33 seems more stable the past few weeks (I assume because of software updates).
i really like the crystal clear detail, big sound stage, punchy bass, and dynamic range of the NAD M33 with my B&W 802D2 speakers. The Dirac room correction seems to compress the dynamic range of music too much for me and pushes the sound stage too far into my room. I have since moved my speakers to the recommended Cardas speaker room position placement and that seems to have helped a lot with bass reflections so I am using the NAD M33 without Dirac. Were you able to get the Dirac dialed in with your system where it improves the sound from the non Dirac setting?