KOB: I've had lps and tapes and then the earliest US Cd, then the Gold cd, then the cheap cd, then the box set, then a DSD remastered Japanese cd, then the US SACD. I still have the Gold cd, the box set, the Japanese DSD cd, and the SACD. I listen to the DSD cd most often; I think it sounds wonderful.
Giant Steps: I've had LP, tape, early Atlantic cd, Heavyweight Champion box set. Just have the box set now.
All this started in the mid-seventies. I listen to KOB more than Giant Steps, by a goodly margin.