Are you talking lunch or dinner? What's the make-up of your party? What sort of thing are you looking for - I know you say 'special' and 'money no object', but do you want upscale, somewhere for all the family, romantic?
We've been to many of those Cleo mentions. My current upscale favourites are bluezoo (WDW Dolphin), Victoria & Albert's (Grand Floridian), California Grill (Contemporary) Norman's (Ritz-Carlton Grand Lakes), Ruth's Chris (Sand Lake Road, although there are various locations), Old Hickory Steakhouse (Gaylord Palms).
A bit less sophisticated, but equally as enjoyable, are Salt Island Chophouse and Fish Market (I-Drive), McCormick and Schmick's, Cheesecake Factory (both with outlets at both the Mall at Millenia and Winter Park), Primo (JW Marriott, Grande Lakes).
A few we haven't eaten at for a couple of years, but would go back to are Emeril's (CityWalk), The Palm (Hard Rock Hotel), Flying Fish Cafe (BoardWalk), Artist Point (Wilderness Lodge), Citricos (Grand Floridian). The first time we ate at Tchoup Chop, we loved it, but we were extremely disappointed on our second visit.
I could go on and on - you've hit on my favourite topic!