Replacing the C320 with the C370 is not really an upgrage in my opinion. I am familiar with the NAD sound and if you feel the sound of C370 is grainier than you should go out and buy something more refined albeit at a higher price to really get the sound you are looking for.
My friend after great diliberation finally settled on the Audio Analogue Puccini, a faboulous amp I must say. Very refined and has enough oomph to be able to drive most speakers. The amp was first hooked up at my place when it was new and later hooked up in my friends system. I have heard the amp many times since then and am familiar with its superb sound.
I am not suggesting you go and buy one, I am simply letting you know that there is a superb amp awaiting your audition.
Goodluck,
Quadophile
My friend after great diliberation finally settled on the Audio Analogue Puccini, a faboulous amp I must say. Very refined and has enough oomph to be able to drive most speakers. The amp was first hooked up at my place when it was new and later hooked up in my friends system. I have heard the amp many times since then and am familiar with its superb sound.
I am not suggesting you go and buy one, I am simply letting you know that there is a superb amp awaiting your audition.
Goodluck,
Quadophile