For me, in the 7th, I'm finding Zinmann and Tonhalle slowly making it's way to the top spot. It's the most cohesive 7th I've encountered. Many don't like Zinmann because he plays pretty straight with his interpretations, but that's what I really like at this point in my life. I've never felt that Mahler needed much intervention on the part of the conductor. And, there are certain sections in his recording that, personally, can't be topped. It's also nice that the recorded sound is exceptional, and not spot mic'd to death like Vanska. They sound a like a real orchestra, not a collection of musicians that's been recorded.
My other favorites are Inbal with the Czech Philharmonic, Kubelik/New York Phil, and Gielen/Berlin. It's nice to have so many choices these days.