This 1969 performance of Tchaikovsky's Fifth Symphony has been the object of some attention from internet bloggers, with one site
featuring an almost complete audio recording of the performance. Readers were astonished at the intensity and drive behind Erich Leinsdorf's interpretation.
Bonus features:
A live performance at Sanders Theatre, Harvard in 1963, Leinsdorf and the BSO performed the second movement of Mozart's Serenade No. 9 in D Major, K. 320.