This is an extremely difficult question to answer; it is very dependent upon what is being played. As an example, I think Karajan's 1962 recording of Beethoven's 9th is superb; however, conducting the 6th he sounds like he's in a hurry to get to his next recording. Carl Bohm does a superb 6th, but messes up on the 5th (no teeth). I heard Kurt Sanderling (with Radu Lupu) do a wonderful job on Beethoven's 4th Piano Concerto, live, but his recording of Beethoven's 6th is a sleeper. SO, back to my original statement....depends upon the piece of music.
