Probably a Haitink 9th from around 1996 with the BSO. Ordinary? Not for me. A fine conductor with a great orchestra in the best orchestral hall for sound in American playing the Mahler 9th adds up to something special. I don't doubt that there might be more overwhelming performances, but what I heard was memorable. The Kubelik 9th in 1976 in Vienna took us to another world of beauty and feeling ad metaphysical yearning. The Haitink performance I heard reminded me of Bruno Walter's stereo recording from about 1960. The next year was a fine Bruckner 8. And in 2002, a marvelous complete Pelleas with the divine Lorraine Hunt Lieberson.
The time tunnel Ring in London around 1990 had some truly incandescent moments.
Haitink can be a bit phlegmatic at times, but when caught up in the music he can have a magical effect.
Tom in Vermont