A little over a year ago, I did the same comparison between Onkyo/Integra, NAD, Denon, etc., that you're now doing. My system is 2 channel, music only - so no comments from here on the video side of the equation.
I went with the Onkyo (in part) because my ARC VT130SE power amp lacks a phase splitter and requires a true balanced signal and (in part) because Stereophile was so enthusiastic about XT32.
Even when using other power amps - and I have several - I am delighted with the choice I made. The system sounds great. I suspect that it would sound really good with the NAD, too, but I have no complaints and can recommend the Onkyo for 2 channel music without reservation.
Marty
I went with the Onkyo (in part) because my ARC VT130SE power amp lacks a phase splitter and requires a true balanced signal and (in part) because Stereophile was so enthusiastic about XT32.
Even when using other power amps - and I have several - I am delighted with the choice I made. The system sounds great. I suspect that it would sound really good with the NAD, too, but I have no complaints and can recommend the Onkyo for 2 channel music without reservation.
Marty