Possibly the Pizza Barn in Ossipee? It gets rave reviews and has won awards. It definately is expensive. Personally I didn't think it was that good.
Great topic I would love to get opinions on good pizza places in the lakes region. I live in Moultonboro and the best we got is from a convienece store. I have to go to Meredith if I want a decent pizza from the Pizza Factory on Main Street.
The pizza is pretty good but small and a little on the expensive side. But it is the best I know of in the Moultonboro area.
If you are ever in the South Burlington, VT area and looking for a great pepperoni pizza try Zackary's on Williston Road. It is called the Pepperoniest Pizza

and definately my favorite in the New England area.
I can make it there in just a little over 2 hours from here and just the excuse I need for a Saturday drive.