The Klieber perfomances are excellent. Some of the better performances on LP, however, do not offer the best sonics. One case in point would be Szell's. I have the ones on the Epic label - I am told the original releases sound better. There are also some great performances on the Angel label by Giulini and Klemperer. Some of the Böhm ones on DG are great performances, but again not so great sonics. The Karajan ones are hit and miss, depending on which set of his you are listening to, and I am not familiar enough with them all to comment on which are the best.
For many musicians, the best period instrument performances by far are those of John Eliot Gardiner, though these are only available on CD to my knowledge. Much better interpreted and performed than the Norrington versions, for sure.
For many musicians, the best period instrument performances by far are those of John Eliot Gardiner, though these are only available on CD to my knowledge. Much better interpreted and performed than the Norrington versions, for sure.