I've been put in charge of planning a pizza party for students and locals this weekend. Most student groups order from Pizza Mercato, which is just this side of hellacious, so our group has traditionally ordered from John's as a sort of "treat" at the end of the year. Being a CHer, I'd like to try something a little different. Are there any recommendations for a pizzeria, preferably one that delivers, that stands above the rest for flavor and economy? We will be on 6th Ave.