Among the best restaurants in Naples in the 50-90 EUR price range for lunch is Quattro Passi, which serves the best seafood dishes. Il Faro di Capo d'Orso is no less famous for its spaghetti with mussels and goat ravioli.
Note that prices in restaurants in expensive areas of Naples are by 30-50% higher than in less touristy areas. For example, Don Salvatore or Sorbillo are the few good restaurants in Naples where you can dine for 30-50 EUR.
Inexpensive restaurants and trattorias in Naples (average bill 15-20 EUR) include Da Michele and Pizaria la notizia. According to reviews, these are some of the best pizza restaurants in Naples. The Medina, Antica Trattoria da Carmine and La Taverna del Buongustaio are also in this category. Keep in mind that in trattorias the menu is usually in Italian only.
The prices in the cafés and pizzerias of Naples will please tourists - for 6-8 EUR you can have a hearty pizza lunch or a coffee with pastries. By the way, coffee in Naples is served in heated cups to give off the aroma - be careful!
Pellone, Pizza Baba Tratoria, Nana are just a few of the best cafes in Naples.