The NAD has plenty of beef to drive these speakers correctly. I own these speakers mated with the VS1 subwoofer for my home theater rig..I also use the VR1 speaker stands...I'm using a 120 watt a side Consonance REf 150 hybrid integrated...these speakers like power and the hybrid lets me get some tube benefits.If you really like solid state I'd get a used BAT VK200 or McCormack DNA .5....much better sounding than your choices and not hugely more expensive...you'll be happier in the long run and save on equipment upgrade costs.
Larry