I agree that the original D3020 was amazing value for the money. It set up 3-4 friends of mine into early audiophile status. It is absolutely enjoyable sound that reveals a LOT, and many people don't need more. My weekend cabin (which during covid became my main place for a year) was perfectly served by it, I just replaced it with a used D7050 because it allowed me to set the xover to the basic Yam sub. But I may just plug the D3020 back in. Brilliantly enjoyable paired with Totem Dreamcatchers and a Squeezebox Classic (SB3) and a Linux-powered Lenovo X200 music server.I can't comment on NAD D3020V2 since I never had a chance to hear it but I had the original (no phono) and in my situation, 3.5X4.5 meter room it was absolutely suitable for critical listening and played with authority with both Martin Logan LX16 and Focal Aria 905 speakers.
For years it was in a group C (borderline B) of Stereophile recommended components (and that will probably earn it some demerit points). At that time I can't even think of any other amplifier with the same feature set and sound quality at anywhere close to the price.
I wish I could find a link to some Australian audio magazine review with very comprehensive set of measurements and most were better than what NAD was claiming.
Haven't heard the v2 or D3045, but my problem is I personally have zero use for phono or analog inputs, so that additional functionality is wasted on me. I think it's kinda contradictory to demand superb measuring SINAD and then throw vinyl into the mix...