Greg is right to my mind. I would leave the Lied von der Erde and the Kindertotenlieder for much later. I second his suggestions as for the sequence of the symphonies as well as for the conductors and orchestras. I would start with the 5th and then go to the first and second. The Barbirolli is sonically excellent as well. If you cannot find any of the above, Greg has suggested, I'd go and hunt for the Bernsteins. Forget Mahler on CD. It just does not come across in this format.
Cheers,
Cheers,

