Thanks to the 2 good people who answered, I appreciate you taking the time. I just noticed that there were not many used CD12s on the market, and the few that were are selling at the same prices (or even higher) than 2-3 years ago. I guess CD12 owners feel no reason to change things.
The Linn seemed to be universally regarded as a religious experience to hear; "haunting" was a common adjective for it. I heard it once at a show (HE 2002 in NY) and was impressed, but I spent too short a time to really tell if was that much better than the Accuphase. The difference from the 75V did not jump out at me (as say the difference between my former Meridian 508.24 and the 75V, which was, to my ears, a revalation, the 75V was soooo much better).
I think digital artifacts really make themselves known in sustained musical notes, especially from a woodwind or from a singing voice, especially a close-miked one. I wonder if the Linn beats the 75V in this acid test.
Thanks again to the 2 respondents and for any further comments about the CD12 vs. the 75V or the newer state-of-the-art redbook playback systems.