I'll do you one better; I can recommend two, Trish! Depending on the type of special and memorable experience you're looking for one of these should fit the bill.
Immediately after reading your question, the
Hoop-Dee-Doo Musical Revue came to mind. It's well-known for being one of the best places on property to celebrate a birthday or anniversary. Dinner is served family style, and is all you care to enjoy (including beer, wine and sangria). The show that takes place during dinner is hilarious and will almost certainly leave you clapping your hands and stomping your feet to the beat.
Now, if you're looking for a more reserved, sophisticated , meal might I suggest dinner at
California Grill? The view from this restaurant is tough to beat, especially if you schedule your reservation to coincide with the Magic Kingdom fireworks. The food is delicious and the service is superb. Do keep in mind that as one of Disney's signature restaurants, there is a dress code, but it's nothing too stiff.
Hopefully one of those two very different experiences will suit your celebration perfectly!