The hint is very good, since NAD 350 (mostly the new 352) is the main competitor of Cambrdige 640. At least, this is the situation here in Romania and on some European markets. The price is quite similar, arround 500 EURO each of them, but on the paper NAD has more power. When you listen them they seem quite similar in terms of power and driveability. Regarding the sound, it's a matter of taste. Personal, I like more the Cambridge