Hi Rod,
Just caught your post. I still own my 20.1 and intend to keep it; it's a very musical piece.
Hearing it with a P3 and Meadowlark Kestrals is what really got me into this hobby. It's been packed away for about 3 years, but we had a brief reunion not too long ago. I popped it back into my current system after selling my Belles 150a Ref while awaiting my current Belles 350a Ref. I didn't feel like I was missing out at all, and, with my McCormack RLD-1, it provided more than adequate power into my Meadowlark Ospreys (22x15 room), despite its mere 22wpc. While I can't specifically describe it, I feel that its single-ended, class A design conveys the music in a special way.
A few years ago I heard from an 20.1 owner who had his modified by Musical Concepts and thought it was elevated into Mark-Levinson territory.
If you might be interested in a copy I have of a review from a site in the Far East that contrasts the sound of the amp in stereo and bridged, send me an email address to which I can send a pdf attachment and I'll gladly send it out.
Enjoy your new amps!
Marvin
marvsteindler"at"mac.com