I have a weakness for crab, and the best crab I ever had was in Fulton's...having said that, if I were to be objective and not let my love of crab govern my opinion, I think I'd go with Flying Fish!
Flying Fish also gets my vote...with one exception..the Lobster seems much better at Narcooses...but FF has a steak that is to die for as well..in case someone wants some red meat!..Flying Fish is a bit noisy while Narcooses is much quieter and has fireworks viewing as wel....sigh..its always hard to decide...desserts I like better at Narcooses as well...but Flying FIsh has a great location!+