What is the best sounding Mahler symphony cycle?

In Russia, Richter recorded on some rickety pianos in the boondocks.  Yet, the genius shines through..

I really like a version of the Mahler 9th conducted by Blomstedt but it is not comercially available as I recorded it form a BBC Radio 3 broadcast and to me it is devine with all I ever want from a Mahler symphony , it has wonderful dynamics , extreme pathos and a vulnerabillity you can only get from Mahler and it is conducted by a man who the audience and orchestra love.

I never heard any Blomstedt Mahler; I just assumed it wasn’t in his repertoire 

I am listening to the Blomstedt Ninth on Qobuz now so it must be available?
Just finished III; so far it’s excellent 

I had ordered Fisher/Budapest M1 and I have to concur with the naysayers here.  It’s nicely played but in a ridiculously crowded field it doesn’t offer much that is new.