You will probably be as incredulous as I was to learn that the greatest cycle of Mahler symphonies comes not from any of the usual suspects - Abbado, Bernstein, Chially, Haitink, Kubelik, Rattle, Sinopoli, Solti, Tennstedt - but from the unsung Gary Bertini, who spent the better part of his career as music director of the Cologne Radio Symphony Orchestra. Unlike any of those more publicized sets, each of which includes a misfire or two, Bertini is consistently successful from first to last; his performance of each of these works can stand comparison with the very best available.
A host of accomplished conductors including Daniel Harding, Daniele Gatti, Bernard Haitink and Eliahu Inbal lead the Royal Concertgebouw Orchestra in these performances of Mahler's Symphonies Nos. 1-10. Recorded in Amsterdam over two seasons in 2010/11, the collection also includes 'Das Lied von der Erde'.
Karajan's way with Mahler is smoother, less anguished or conflicted than many critics like, but he isn't glib or glossy–this is excellent, insightful conducting. I can't imagine why DG doesn't have more faith in this recording or why critics haven't discovered it. It's not as though Karajan is a hidden talent. After collecting Das Lieds from Rattle, Bernstein, Horenstein, Tennstedt, Kubelik, Giulini, Salonen, Sinopoli and Walter–the list goes on–I sitll rank this version almost as high as the Klemperer. Certainly no one has done it better since. - from Amazon.com