The Lacy is good, but the one from that era that REALLY smokes is Sortie, issued originally on the Italian GTA imprint (RCA-related, iirc). Has Kent Carter and Aldo Romano in place of Dyani and Moholo.
Apparently the ESP was taped at a fluxus event/happening; I suspect Guillermo Gregorio has some recollections of that period in Argentine art and music, and could probably contribute some interesting anecdotes/thoughts if asked nicely.
These were all done by Calibre before (as were the Byron Allen and the Grimes), so I can't imagine we're getting much new here. Great records though, all of them. The Silva is a favorite of mine, as is the Berger. The tapes are in Berger's care, so I don't think they'll be reissuing that one... as for Skillfulness, I recommended it to Bernard for reissue, but that was some time ago.