I have several sets of the symphonies of Rachmaninoff, my favorite composer, and the performances by Eugene Ormandy with the great Philadelphia Orchestra have special authority because of the close association the composer had with Ormandy and the Philadelphia. As shown here
with them studying the score at a rehearsal, Rachmaninoff's last orchestral composition, the Symphonic Dances, was dedicated to Ormandy and the Philadelphia.
These beautiful and thrilling symphonies together with the orchestral version of the Vocalise, performed with authority in fine remastered sound, are available again in a 2-disc set for about $10 shipped from Amazon sellers
, and shouldn't be missed.