Two orchestra tickets to “Il Barbiere di Siviglia” on Wednesday, 12/3/14, at 7:30PM. In Bartlett Sher’s effervescent production of Rossini’s most popular opera, Isabel Leonard is the beautiful and feisty Rosina, who won’t be kept under lock and key. Lawrence Brownlee is her conspiring flame, Almaviva, and Christopher Maltman is the omnipotent barber, Figaro. Michele Mariotti conducts.