ideas
Wow - nothing like planning ahead! By 2015, there might be new options, but for now:
It's tough to beat the food & wine at California Grill, and going out to view the fireworks with the Wishes program playing is really nice. However, if you've done that before, and want to try something new:
Victoria & Albert's is a really special and wonderful experience - like 25th anniversary special, but yes, its pretty expensive.
Jiko has great food and a nice dining room that's romantic, and there's the added benefit of being at the ALK when you are done, so you can take a nice walk out by the savannahs (and use the night vision if its not too late) and/or sit by one of the beautiful fire pits. Victoria Falls is also pleasant for an after dinner drink ...