I play a lot of rock and metal and like a warmer full bodied sound. Now i'm looking at a amp for my Tannoy XT6F speakers. The cambridge becomes very good reviews, but is Cambridge not bright sounding? And then the NAD? Is it wise to buy the old C356 now there is the C368? But has the C368 still the NAD sound, warm with good baas en not bright highes? I read that the C368 is digital D. I mean in the past this was cold sounding? I'm looking now at these amps, not other brands please.