I must say by far the greatest & the most idiomatic playing that M9th ever got was from none other than the Philadelphia Orchestra in their 1979 RCA recording. Sadly, when they digitized the tape to CD, much of the splendor of the original analogue recording got lost; the dynamic range was compromised, some details were lost. I got my LPs transferred to CDR and it sounds much better than either RCA CD or Japanese remastered CD. Great conducting from James Levine. Stick with your LPs.
John,