What is the best sounding Mahler symphony cycle?

@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.

I think we are spoiled for choice in Mahler.  The greatest Orchestras —in no particular order, the Berliner Philharmoniker (the fashionable way  to refer to that ensemble), Vienna Philharmonic, Bavarian Radio Symphony, Amsterdam Concertgebouw, Chicago Symphony)—have all recorded multiple Mahler cycles. The Cleveland, London Symphony, Philharmonia have all had significant Mahler recorded histories.  The New York Philharmonic cycles with Bernstein (I am more familiar with the sixties cycle) and the London Philharmonic live recordings with Tennstedt represent two cycles with excellent ensembles /Conductor combos with particular Mahler affinities. 
  As I alluded to in my first post, lately there has been an explosion of Mahler recordings, many with Orchestras that perhaps aren’t thought of conventionally as ready for prime time.  Witness Fisher brother #2 and his hardworking Dusseldorfers.  I haven’t heard many of these although the reviews are excellent.