Illinois, Minnesota, Wisconsin, Iowa, Pennsylvania, back to Minnesota - we're all over the place singing our durable "Love Story." Yesterday we came from Ames, Iowa via Desmoines and Chicago to New York for a concert at the Metropolitan Museum - home to our cherished Christmas series in the Medieval Sculpture Court. This time we were celebrating the opening of the new American Wing with a concert of American music in the Englehard Court. We started with Mexican Baroque and ended with Ellington,passing by Barber, Sametz, Whitacre, and Paulus, and had the impression that the audience - a lot of whom we recognized from Christmas-seemed to enjoy the change of pace. Tomorrow night we'll be sleeping in Mars ( Pa.) and performing in Wexford, Pa.