Ron, there are many complete sets still available, including those by Simon Preston, Kevin Bowyer, Marie-Claire Alain, Alessio Corti, André Isoir, Michel Chapuis, Jacques Amade, Bernard Foccroulle, Gerhard Weinberger, Hans Fagius and David Goode, all estimable players, but the available formats also vary widely, so it may really depend on which you prefer, and naturally your choice is maximised if you can accommodate any of those formats such as CD, SACD and downloads.

I have the excellent Kevin Bowyer set in the complete MP3 edition, which was glowingly reviewed here: https://www.musicweb-international.com/classrev/2010/Apr10/Bach_Organ_Bowyer_NI5280_NI5289_NI1721mp3.htm

It comes as physical CD-R discs containing the high bit-rate MP3 files, which can be played on universal players (not CD-only players) and PCs with disc drives. The MP3 files can be easily transferred to other devices such as mobile phones and portable audio players.