Record collectors have long been accustomed to a one-sided search for one particular piece in a maze of two-faced records. Is that Mozart's 40th on the flip side of Haydn's 88th? Is Beethoven's "Waldstein" Sonata on the other side of the Schumann Piano Concerto? Now this petty but annoying problem is all but solved. More and more companies are offering omnibus collections of great composers in one volume, uniformly boxed and carefully indexed.
Leonard Bernstein: Beethoven's Nine Symphonies (8 disks; $35.98; Columbia). A great many complete sets of the Nine already exist: Klemperer,...