Talking of NAD equipment, has anyone any experience of the C162 Pre-Amp and its corresponding Power Amp, C272? I am considering whether to purchase a pair and possibly add another C272 to either Bi-Amp or Bridge. Does anyone have any comments to make on Bi-Amping and Bridging, not necessarily with NAD equipment. I listen largely to classical music, but enjoy Jazz and my wife likes her pop music. Your thoughts please.