Hi Rual,
For people already appreciated Celibidache's interpretation, Knappertbusch's Bruckner collection (symphony 3, 4, 5, 7, 8 and 9) would provide us some different perspective(s).
Should I advocate the performance(s) of Furtwnagler as well?
For my personal taste, I always admire Walter's passion and Klemperer's objectivity when they approached Maler's music.
To all Brucker and Mahler fans out there, happy listening.