You may recall that I posted this about Haitink doing Mahler 9 on March 4th.....
"I can certainly sympathize with that feeling, as that's exactly how I feel about Haitink in other pieces. And I must concede, parts of that performance were magnificent. But I didn't feel as though that weight could be sustained all the way through the performance because Haitink seems to have a resolute refusal to inflect the piece. In certain Mahler pieces in which the form is more severely constructed (particularly the 4th and 6th) this somewhat extremist non-intervention will not matter as much - at least not for me. I really like Haitink's latest M4 and M6, mixed reviews or not. But I suppose for Mahler 9 I either like it uptempo or flexible, my favorites at this point are Abbado, Bernstein, Barbirolli, Kubelik and yes, Bruno Walter. (...though I make an exception for Riccardo Chailly)."
Not the most original list, but I can't claim I've listened too exhaustively to the M9 discography. In greater detail, I prefer Bernstein's recordings with New York and the Concertgebouw to Berlin and Vienna. Abbado with Berlin strikes me as a stunningly visceral performance that immediately went straight to the top of my list, I haven't heard his Vienna recording. Barbirolli is a particular favorite of mine, the warmth of the phrasing and the elasticity bring to mind not only Furtwangler in Berlin but moreso...Bruno Walter in Vienna. And I make no apologies for thinking Walter/Vienna a magnificent recording (magnificence being very different from perfection). As for Rafael Kubelik, he's one of my all-time favorite conductors. I haven't heard the studio recording since college, but the Audite is wonderful in parts, though I'm not entirely sure it adds up.
As for the other sacred cows: I'm not at all keen on Karajan in Mahler 9 (Mahler 5 is another story), nor is Klemperer one I'm particularly inclined toward in this piece. It's likewise been since college that I've heard Haitink. I remember being impressed without quite being moved. I've only listened to the first movement of Rattle/Berlin and felt disappointed. Walter's second go is feeble, as is much (though certainly not all) of his late-period CBS work. Boulez is quite far from my favorite Mahler conductor generally, and M9 wasn't Gielen's finest hour. I still haven't heard Giulini, but I'm not huge on him anyway. Never heard Levine, but I love his Philly M5 so I'm very curious about his first go. Would like to hear the Szell recording, though I think his M4 is a bit overrated.
The three conductors I'm most looking forward to hearing soon are Abbado when he conducts in Lucerne, MTT/SFS when I figure out a way to get it (without paying), and the inevitable Fischer recording that I hope will blow me out of the water. Zinman I'll listen to sentimentally, as I heard him conduct it in Baltimore when I was 11. And I suppose I'm also very curious to hear what Barenboim made out of it, even if it turns out badly.
Lastly, a good word for a sleeper. Barshai's Moscow Radio recording for BIS. Not my pick for the greatest performance (though you could do far worse), but quite an interpretation. Barshai is the Charles Mackerras of Europe's other edge, and continues to be scandalously underrated as he approaches his late 80's.