Nad makes great, affordable, "starter" hi-end gear...what more can one say? If u can afford better...by all means...go for it...but you will have to spend 3x the cost to surpass the Classic line of intergrated amps...which basically brings u to the Bryston b-60...
Any opinions on NAD quality?
As with nearly all listeners, I believe the NAD sound to be just about the tops for the money expended. However, I have heard reports of quality control issues (nothing specific) to the point of being much worse than other manufacturers. Along with a lot of other audio equipment, I own a NAD c 740 receiver, less than a month old, and so far it's working quite well. Still, I wonder what's ahead.