I bought my C350 four years ago. If you want to buy a good quality amp at a reasonable price, you can buy this amp with closed eyes. NAD is a frabriquant English (made in china anyway) that the amps are very famous. I think this model has received a Diapason d'Or (check). It is equipped with a Class A preamp (professional) and élicoidaux transformers, heavier but that mitigate the parasites associated with food sector.
In terms of listening, we appreciate the dynamics and fast relief. The stamps are met, the treble is not too pushy (unlike the Japanese brands such as Denon or even technics), no distortion, crosstalk is good ... Need I say more? If I have to change in the same price range (transistor), I bought a NAD (or Marantz).