If you're not on the dining plan, give some consideration to Il Mulino in the Swan. I'm not a big fan of either of the Epcot Italian options. They are considerably overpriced for the quality of food and menu selections. If you have good Italian restaurant in your neighborhood, I'd wager that it is better than anything you'll find at Tutto Italia or Via Napoli, especially the former.
Anyway, Il Mulino is only about a five to ten minute walk from the World Showcase entrance, and you can take a ferry boat right to the front door, if walking isn't your cup o' tea at the time. By most accounts, it offers the best Italian food in or around any of the parks.