Your favorite Mahler recordings on vinyl

I love that Vanguard Wunderhorn LP.  Wore out my first copy.  Managed to find a near mint copy on EBay.
I also second the Haitink/Ameling 4th.
The 9th with Barbirolli and the Berlin Philharmonic on EMI/Angel is great, musically and sonically.
I first got to know the 9th and Mahler for that matter on a wonderfully sounding performance by Kondrashin, of all people, also on Angel.  Evidently he was a Russian Mahler specialist.

no. 1: Walter (columbia MS 6394) or Kletzki (hmv ASD 483)
no. 2: Klemperer (columbia SAX 2473/4)
no. 3: Bernstein (columbia M2S 675) or Mehta (decca D117)
no. 4: Szell (columbia SAX 5283) or Klemperer (columbia SAX 2441)
no. 5: Barbirolli (hmv ASD 2518/9) or Solti (decca SET 471/2)
no. 6: Barbirolli (hmv ASD 2376/7) or Solti (decca SET 469/70)
no. 7: Solti (decca SET 518/9)
no. 8: Solti (decca SET 534/5)
no. 9: Walter (columbia M2S 676) or Klemperer (columbia SAX 5281/2)
Das Lied von der Erde: Klemperer (hmv SAN 179)
Des Knaben Wonderhorn: Szell (hmv SAN 218)

I am a bit of a Mahler hobbyist and I find myself in agreement with @edgewear above — with a few additions:
No2 - additional: Klemperer / Concertgebouw, (EMI live)
No4: definitely Klemperer!
No5-6: definitely Barbirolli (maybe 6 with Solti) -- unbeatable passion!
No8: additional: Horenstein (BBC classics)
No9: additional Bernstein / Berliner (DG live)
Das Lied: definitely B Walter / K Ferrier, Vienna Symph (Decca) Ferrier had been diagnosed with breast cancer (of which she died 1 yr later); she sings her heart out. A monumental performance!

Yes, of course Das Lied with Ferrier and Walter on decca is indispensable. How could I overlook it? But it's in mono, so sonics are somewhat limited. As for that live Bernstein one-off with the BPO on DGG: I didn't mention it because I have this on CD and didn't know it was also issued on vinyl. It's a 'must have' performance for sure, whatever the format. Bernstein's later DGG live cycle (with NYPO, VPO and CGOA) has some great performances as well, notably no. 6 and 7. These were originally issued on vinyl as well as CD. They're digital recordings, which is why I have them on CD. 

I have two pressings of the Horenstein Mahler 3rd.  The Unicorn pressing is flawless but oddly eq'ed and a bit lifeless.  The Nonesuch pressing is sometimes noisy and the center hole of one of the discs ain't exactly on center but string tone can be gorgeous.  Bottom line, the Nonesuch is my go-to choice.