[BluesDuke]

In no particular order of preference:

Handel, Water Music (There is a brilliant recording of the complete, unedited Water Music suites by Pierre Boulez conducting the New York Philharmonic.)
Debussy, La Mer
Beethoven, Piano Concerto No. 5 ("Emperor")
Mendelssohn, Violin Concerto (specifically, its interpretation by Isaac Stern, may his soul rest in peace)
Bach, Concerto For Two Violins and Orchestra (my favourite: Isaac Stern, Itzhak Perlman; New York Philarmonic, Zubin Mehta - Conductor)
Vivaldi, The Four Seasons (my favourite: Itzhak Perlman conducting the Israel Philharmonic)
Brahms, Violin Concerto
Tchaikovsky, Piano Concerto No. 1 (as performed by Philippe Entremont, piano; New York Philarmonic, Leonard Bernstein - Conductor)
Debussy, L'Apres Midi d'un Faune (Prelude to the Afternoon of a Faun) (New York Philarmonic version)
Dvorak, Symphony in E Minor ("For The New World") (I've always been especially partial to the recording by the Cleveland Orchestra with George Szell...)

[Pharmboy]

We've had many votes for Water Music; it perhaps leads the league at this point in votes. And thanks for reminding me about the Bach Double Violin Concerto. I wore out one LP of that piece when I was in college.