Thanks for the responses thus far!
I find it interesting that all have been focussed on Coda, and none on Jeff Rowland. I presume that the lopsided disparity is due at least in part to the fact that the latter is Class D, and many audiophiles remain broadly skeptical, or unsold on its SQ versus Class A or A/B.
It has been many years now since I had the 1st gen. JRDG Concentra in my system, but the positive memories linger. Note that I am not a spring chicken, and that with the '80s as a starting point, I have owned some excellent SS amps including Bryston, Pass (albeit an early Aleph), Accuphase (albeit vintage), and Gato.
The Concentra provided what I perceived to be a level of speed that seemed to set it apart. Drum strikes, in particular, were more visceral, and decays seemed more realistic, etc. It reproduced fine detail, but was more smooth than clinical to my ears. Etc.
Hence, my curiosity about his more recent Continuum.