I like a good number of his recordings. Unfortunately, most of his RCA recordings suffer from poor sonics (IMO), although some of the Japanese remasters that I have offer sonic improvement. Both of his Brahms cycles are among my favorites. The VPO/DG one is available from Arkiv as one of their commercial CD-R sets. I also have a copy of the Japanese remastering of the CSO/RCA cycle. I do not have the remaster of the Dvorak 9 that you mention (nor any version of the 7th). The version that I own is absolutely unlistenable due to a SCREECHY high end. It DOES sound like a performance I would enjoy if I had one with better sonics.
I find most of his RCA Mahler cycle to be quite enjoyable, despite the variable sonics. His M4, M6, M7, and M9 are among my favorites. I would easily add his M3 to the list of not for the 40 minute finale (or perhaps it's closer to 27'?
). The M5 is a favorite of many, but it didn't do much for me the couple of times I've listened to it. I can't rememeber if I own the M1. I also like his Berlin/DG DLvdE, despite its slow tempos. I even like the singing of Norman and Jerusalem (I recognize that they are not favorites of others). On the downside, I find his M10 to be the worst of all Cooke versions (awful finale), and his Munich M9 is uninspiring.
Other recordings of his that I enjoy:
Beethoven Piano Concertos w/ Brendel/CSO
I can't say that his Saint-Saens Organ Symphony does much for me (I prefer slightly over-the-top finales); same for his Sibelius 2.