seems to be a lot of people having troubles with h/k lately. Granted, you only mostly hear the bad side on forums and such, but I've read so much about it that I totally crossed off h/k from my list. That and the fact that they tend to be a warm sounding amp of which I do not like.

M-80 Mil.
VP-150 and QS8
M3 V3/On Wall M22V4