If anyone is on the fence about attending the Pacific Symphony’s concerts tonight or tomorrow, go. The guest conductor, Jean-Marie Zeitouni, is special. His readings of Debussy’s “Nocturnes” and Britten’s “Young Person’s Guide to the Orchestra” are truly remarkable, and he has the orchestra sounding top-notch. The Britten is performed with narration on film, homemade for the occasion, and I think quite enjoyable.