We scoured Chowhound before our recent visit to Naples and got some terrific advice. Here's our report:
 Hosteria Toledo - Great food. Pasta in Genovese Sauce; grilled octopus; fried zucchini with mint. Perfect preparation, great ambience.
 Tandem (centro historico) - Ragu is what they do, and it is fantastic. Hearty, rich ragu over rigatoni with full-bodied red wine (we had Lacryma Cristi). Don't miss this.
 Cantina di Sapienza (near Archeological Museum) - good lunch spot. We had Gnocchi alla Sorrentina, mozzarella di bufala, and Salsicchie (grilled sausage) with broccoli in garlic and olive oil.
 Da Dora (Chiaia) - still thinking about that delicious seafood risotto and misto mare -- delicate, perfectly fried baby squid and little fish. Tony, the waiter, is an institution. He spent months cooking for an Italian base in Antarctica, where, to pass the time, he memorized arcane details like U.S. state capitals. Take your time here.
 Locanda Ntretella - great spaghetti al vongole.
 Locanda di Don Vincenzo (Vomero) - very nice lunch here after visiting the Certosa di San Martino. We had a terrific Tagliatelle with Funghi and Prosciutto and a Tagia di Manzo (I'm probably getting name wrong - it was grilled steak strips over arugula with lemon and shaved parmesan).
 Pizzeria Brandi - jam-packed with locals, this pizzeria had terrific, well-prepared pizza. We got pizza with prosciutto crudo and pizza with anchovies, capers, and olives. Both delicious.