Santarpios and Regina's in the North End have excellent pie, Caserta's and Sicilia's does as well on the Hill...but a hidden gem in Massachusetts is Bianchi's Pizza at Revere Beach as well as a place called Carluccio's on the Cape in Dennis. Everybody knows the Cape has shitty pizza for true pizza lovers, but Carluccio's is over the top crazy good, especially the Sicilian style.