Just to make it worse, I'll throw in some semi-useful info. I have a couple NAD products, the closest to what you are considering being the NAD 7600, which has within it the 2600 amp. Real powerful. I've run all types of speakers through it too....4ohms, 8 ohms, 6 ohms, whatever. This unit cannot be killed, and it has so much power (and headroom) that I've never had a problem listening to anything at top volume....like right now....Boston's first album coming through loud and clear from some jbl 4312's. My take on the NAD sound? Not brittle at all, leaning more toward a smooth tube sound than anything else. I guess I wonder what pre amp you are using. that should help you decide, right? And, of course, I know NOTHING about B&K!