Here's another vote for Via Napoli. We've felt that Tutto Italia, while fine, was nothing special. On the other hand, Napoli is also overpriced, however, we went with a group of seven, got two half-meter pizzas (which really were delicious) and all ate for about $85 (just had water as our drink) which is the same (if not cheaper) than if seven of us adults ate at a counter service restaurant. I do think it will seem more "worth it" if you're traveling with a larger group as opposed to just a twosome or threesome.
Still, the pizzas were really excellent and we'll be going back to Napoli well before we visit Italia again.