I think the SACD UN-Mastered version is class A+, the CD version is class A.
@tomcarr , I'd put the SACD "Cafe Blue Unmastered" on the best-of-my-best list, for sure. Have you heard the MFSL SACD of "Cafe Blue" (not unmastered)? I go back & forth on those two. I think I am going to do the MFSL tonight. (I've already got the CDs picked out in my mind for this evening.)
Did you know that Impex (sort of recently) released a gold reissue of "Cafe Blue" on red-book (not the original HDCD release that I believe you sere referring to)? I hate to say it, but I haven't even taken the plastic wrapper off of that one yet.
On an aside, is HDCD a pretty noteworthy listening experience?