Here are a few other labels that I should have included on my first post: Teldec (German); Lyrita (small British label); and two labels that I think are now defunct, Supraphon and Hungaraton. These two latter labels were Czech/Hungarian, and they issued some excellent classical LP's during the 1970's and 1980's. Some of their catalog may have been re-issued on CD.
A Japanese label that issued a limited number of D-to-D LP's in the late 1970's and early 1980's was East Wind. And, staying with the D-to-D LP theme, there were also some good recordings from M&K, Crystal Clear, and Century Records.
The other jazz label which also deserved mention is Concord Records, founded and operated by Carl Jefferson (he also started the Concord Jazz Festival). Concord has consistently released some of the best sounding jazz recordings which, happily, also contain some first-rate mainstream jazz. I've also been impressed by the sound quality of the releases on Premonition Records (Patricia Barber's label.)
Last: Sundazed Records has been getting some great write-ups about the quality of their re-issue catalog (such as the mono LP's done by Bob Dylan). I have not heard any of their stuff, and thus will have to let others comment from direct experience.
