Great suggestions. V&A is special but very expensive. HBD is one of my faves for either lunch or dinner. Citricos is a great date and I would also recommend this for a special occasion. If driving, I'd recommend using the valet parking as visitors' parking is across the street and valet adds to the white glove experience. Also, make note of when Wishes is scheduled at MK and you might be able to plan an after dinner stroll on the beach between GF and the Poly and enjoy the show from a distance.
I'd also add Bistro de Paris in France, especially if you like authentic French cuisine. If you get a late seating, ask for a window table (when you book the reservation, they can note your preference) and if they can make that accomodation you can enjoy IllumiNations from your table.