I had to vote based on what I've heard. I picked Marantz (because my receiver is a Marantz so brand loyalty) and I picked NAD (because I've heard some of their integrated amps paired with MA speakers and was very impressed). I have to admit though that I do like the older, IMO warmer Marantz sound more than the new more clinical sound, except for HT that is.
I can't get over that Krell spec of 433 lbs a piece for monoblocks? What a horrible job of overkill and elitism. Who in their right mind would buy those things? I'll take 7.
I wish I'd heard some of the more esoteric brands you guys are talking about but I just haven't. Also I've got to say that one of my favourite kind of amps are vintage Pioneer amps. They just sound great to me, at least the big beefy ones. Oh well, really just a matter of personal taste.