Karajan’s recordings from the 1980’s of Richard Strauss’ symphonic works ranks up there with the absolute best, and DG has put together a 5CD bargain set. All of the big works are here, recorded with ther Berlin Philharmonic. Pretty much every recording here is on my Basic Repertoire list, or as an alternate, so for around $25 you cannot go wrong.
All of the major symphonic works are here:
Also sprach Zarathustra
Till Eulenspiegel’s Merry Pranks