Voted for Mina's. That's one of the few dress-up places we go to when staying at Aulani. The menu and service is pretty high up there compared to what we can get in California.
As other people say, Roy's is a chain. Also, the Roy's at Ko Olina is rumored as the worst Roy's in the chain for some reason. After dining there once, we agree--food was not very good and not snooty enough

In Waikiki, we'd dress up for the 100 Sails buffet in the Prince hotel. Good views, good food (crispy salmon skin hand rolls!) and some locals also dress up and go there. Pretty good snooty factor there.