Don't have much to add here. I have and enjoy all of the Realm titles mentioned, save the Turn Circle.
Realm also issued the Archie Shepp/Bill Dixon split LP that was originally issued on Savoy and later also on BYG and Supraphon.
Also in this Columbia reissue series was Howard Riley's third as a leader, The Day Will Come, which is an excellent album. I have a number of orange-label CBS jazz records, including those of German and French origin. Some fantastic modern and avant-garde jazz titles under that moniker!