What is the best sounding Mahler symphony cycle?

I haven’t heard Gergiev in Mahler, but I really dislike the sonics on all of the LSO Live recordings with which I am familiar.  There is only so much that can be done with that Dead Concert Hall, the Garbage Can.  Let’s hope that Simon Rattle succeeds in getting a new Hall built.
  I really like the Berlioz that I have heard from Xavier Roth with his period group.
   Tennstedt Mahler is something that I have never quite developed a love for.  I do have his Fourth, with Lucia Popp as the soloist, but while I’ve had some people praise his live performances to the skies, for me he sounds sternly Teutonic without the leavening Irony or sufficient Viennese Gemutlich.

@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.