I'd either go to Jiko or Citricos. We had our anniversary dinner at Citricos a couple of years ago and it was wonderful! Last year we had dinner at Jiko's and that was wonderful, too! You can't go wrong with either.
I assume you want romantic? Well, of course California Grill @ fireworks time would be my first choice BUT a nice late dinner at Yachtsman is also "a can't go wrong" suggestion in my opinion. I say late because near the end of the evening the crowds have usually disappeared and it is almost as if you have the restauraunt to yourself - get a table at the windows overlooking Stormalong Bay and the lagoon - very nice- and the food is fantastic. Also a suggestion would be Flying Fish over at the Boardwalk. Enjoy and CONGRATS!!!!!!!!!!
Im not speaking from experience, but we are celebrating our anniversary on our trip next month and we plan to dine at Yachtsmans Steakhouse. I narrowed it down to that and Palio, but Yachtsmans won out. I think either one would be a good choice...hopefully.
Based on feedback from this board, we will be having our anniversary dinner at Jiko next month. I am sure that it will be good. When you make your PS, tell them that you are celebrating your anniversary. Congrats!