Here's a link to some restaurants in Celebration -- our favorite offsite dining venue:
http://www.disboards.com/showpost.php?p=34956129&postcount=463
Celebration is just a short drive from WDW and has some unique places. After dinner (or before), the lakeside area of downtown Celebration is a very pleasant place for a leisurely stroll.
Columbia is a legendary Spanish (not Cuban) resturaunt from the historic Ybor City area of Tampa. They have several other locations in Florida, but it's unlikely that you've ever dined at Columbia.
They have a wide variety of menu items. We've eaten there dozens of times, tried most things on the menu, and everything we've ever ordered has been excellent. The ambiance is a little upscale, and so is the service, but the pricing is moderate.
One MUST at Columbia is the famous 1905 Salad, which is tossed at your table. They have an entree size and we have had it for DINNER. Best salad anywhere...period.
Kilwin's is a chain well worth visiting. It's a store-made chocolate and ice cream place just around the corner from Columbia. Their Roasted Cocunut ice cream is so good that we pack some in ice and bring it home with us! Great place for dessert.
There are numerous other places on that list. We've also eaten at the Old Town Tavern and found it good. Others have posted good reviews on most of the other places on that list.
Enjoly your offsite dining -- you'll probably never go back to the assembly-line food and exhorbitant prices of Disney Dining.