My thought is that many of the Living Stereo three track recordings were recorded superbly however the pressings are compromised. Along the same lines as the Mercury Living Presence pressings. Analogue Productions remastered and reissued a good number of the RCA's and a few of the Mercury's also. I have their Reiner / Chicago 'Scheherazade' hybrid SACD and it is among the best sounding CD's in my collection. I would assume the vinyl reissues to be excellent also.
@lewm I agree, to me the Deutsche Grammophone recordings are tough to listen to, though I have a couple that are just all-right. Do you know Deutsche Grammophone's 'Archive Productions' label, which concentrated on historical performance practice? Since I only have a mono table, I only collect the mono releases. Anyway, they are excellent. I haven't heard the stereo.