Personally, I think both Lombardi's and Grimaldi's get a bit overhyped. The pizza is awesome, don't get me wrong, but the lines are ridiculous, the places get crowded with tourists, and they only serve pies. My favorite pizza on the island of Manhattan is actually a small place in the West Village at the intersection of 6th avenue and Bleeker St. I never remember the name, but for a slice at any given hour of the day there's no place better.