Next on the list for Mahler....

Audphile1, for the Mahler Symphony No. 1 on vinyl, I can recommend the Horenstein/LSO performance on Unicorn RHS 301 (also reissued on Nonesuch, I believe), and the Solti/LSO performance on Decca SXL 6113 (Speakers Corner reissue) that you referenced in your post. These are very different performances, both good and in good sound.
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Rushton, thanks. I'll check out Solti/LSO recording probably.
Thanks

Agree with Rushton, the Solti reissue is quite good quality, both recording and perormance.

If you want something so beautiful, it will make your heart weep, try the Solti recording of Das Lied von der Erde.

There is a superb DECCA 12 CD Box set of Mahlers syphonys 1-10, Richard Chailly superbly conducting, available at a super budget price. For about $30 you can listen to them all and then decide which you want to concentrate finding specific LP's of. I'm sure you will be pleased as these are excellent musically & sonically. Cheers & good luck.