What is the best sounding Mahler symphony cycle?

@schubert , I'm listening to the Fisher via Qobuz. Really an excellent reading of Mahler. And the sound is outstanding; very well mic'd with ambience of the hall. 
Thanks for the recommendation. Possibly the best I've heard in years.

@schubert .  Len, I picked up the Fisher 4.  Struck me as good but not great.  Still like Solti on 4 though it is not great sonically.  What would you say are Fishers best Mahler efforts.   The next time you miss on a recommendation will be the first.

@mahler123.  Agree on the Gergiev LSO sonics.  Since the thread started I've picked up 3 and 6 Haitink/Chicago.  Great sonics, decent performances, especially the 3rd.   I have high standards on the third, having heard Welser-Most at Severance Hall in Cleveland live.  Otherworldly.

The Fisher recordings are great if you haven’t heard a top tier orchestra play Mahler. It’s more an “audiophile” recording than great performances. As for a recent recording there are so many excellent ones from Los Angeles, Philadelphia, New York, Chicago, Berlin, and Concertgebouw. 

@mayoradamwest , @schubert 
The Fisher/Mahler are certainly audiophile quality recordings, and maybe that's one of the reasons for my enthusiastic response to them. I do think Fisher has a good grasp of Mahler from what I've heard. But since there's no compilation of the cycle, I'm exploring the symphonies one at a time.
It's a joy hearing symphonic music recorded with great care using proper microphone placement.

I think it's Grammaphone who lists the Budapest as a world class orchestra, currently rated at number 9.

To add to other's comments, I agree that Haitink/Chicago is top-class Mahler.