I think so too, I was thinking of getting rid of them when I was married to my last speakers, but the match with the Pi,s is fantastic. As for the Bi-polar versus MOSFET issue, I have sold a lot of these. Adcom does their homework and is real particular about their first gain stage. If I understand it right, this is where the magic is. The output is important too, but they sound very similar in the Adcoms. Adcoms rep. said that the older amps were a little dry, the new a little warm. I tend to agree at low volume, but can't say I hear enough difference at anywhere above talkover volume to say that there is a difference. All of this happened over a long time in different rooms, w/ differnt gear. Some say they don't like the new ones, I think they are all great values. ...grain of salt, FWIW...

Thomas