The Orlando Sentinel reviews restaurants in the area.
One place they've starred is Le Coq au Vin on South Orange Avenue.
Le Coq websiteI plugged "orlando" and checked "expensive" (third of four ascending buttons) on the Sentinel's engine, and got 13 hits, including three critically reviewed places and two readers choice awards. You can put in combinations of locations like Disney /southern Orange, winter park, etc.
Based on my visit a few weeks ago, calling the area the "capital of chain restaurants" isn't too far off the mark. There are several very expensive restaurants tied to hotels (Norman's at the Ritz Carlton, Melissa Kelly at the Marriott Grande Lakes, for example) but my guess is that ties very closely to the convention and meeting business.