One of the best recordings of some of these movie concertos was one made in the '50s by Leonard Pennario (a great pianist and student of Olga Samaroff - listen to his Rachmaninoff 3rd!) with the Hollywood Bowl Symphony. He played these works straightforwardly, with the same dedication he would give to the major works of the repertoire. There's also a Liebestraum with orchestral accompaniment and a Moonlight Sonata first movement with orchestral accompaniment on the same record. But if you can ignore those two things...there's also a sprightly scherzo movement from Henri Litolff's Concerto Symphonique. We get to hear that once in a while. It makes me want to hear the rest of the piece, which no one ever plays.