My vote goes to Chefs. They have a nice prix fixe menu for lunch. We recently had dinner at Via Napoli, and weren't impressed by the pizza. The crust was really soggy in the center, and covered in soot on the edges.
Never been to Chefs, but Via Napoli was my worst WDW dining experience ever. Service was bad, food was worse, and the whole experience was only saved by a good pitcher of sangria.