The theatrical event of the summer in New York is the arrival of the Royal Shakespeare Company. It's performing five plays in repertory as part of the Lincoln Center Festival. The British company is not traveling light: in addition to the 41 actors and 21 musicians performing the plays, the RSC has brought a 975-seat replica of its mainstage theater to the Park Avenue Armory. Charles Isherwood of the New York Times speaks with Elliott Forrest about how the theatrical space affects the quality of the productions.