Ravel and Prokofiev. has anyone mentioned these geniuses? Ravel's Daphnis et Chloe and Piano Concertos demand great equipment. huge dynamic range. Prokofiev's romeo & juliet, piano concertos 1,2, and 3, and violin concerto no. 2 are essentials. Especially listen for the excellent contrast at the beginning of Romeo & Juliet montagues & capulets theme! (before the famous lumbering melody strikes) A true test of concert hall aptitude.
