I have a few Mahler recordings made by Exton and Canyon:
M1, M2, M3, M4, M5, M6, M9 on Canyon all conducted by Neumann
M6, M7, M9 on Exton conducted by Ashkenazy
M2, M3, M5, M7 on Canyon and Exton conducted Kobayashi
M3, M4, M6, M7, M9 on Exton conducted by Macal
I love them all but I think Neumann's M6, M9, Ashkenzay's M9, Kobayashi's M3, M5, M7, and Macal's M6, M7, M9 stand out in terms of the playing, sound and everything.
John,