If you are going to Epcot, I recommend the Japanese resturant. NOT the fancy sit down, but the little "take out" spot that is kinda hard to find off to the left. They have delicious Udong and Curry Rice. Also a little hidden place to sit and eat out back.
I also like Spoodles by the Boardwalk Hotel. I haven't been there in years, but it was good then. They have a mediterranean thing going. Not cheap enough for me, but not really expensive.
Other then that.. not too sure. I-drive has good resturants, but overpriced. Depends on what kind of food you are looking for.
My wife and I love to do a "progressive dinner" around the Epcot resorts. At the Dolphin, there is a great lobby bar to start out, then we do appetizers at various restaurants. Blue Zoo has flatbreads and seafood. They have a happy hour now too.
At the Swan, we like Il Mulino's for their appetizers. Italian stuff. Kimono's there has great sushi. At Flying Fish, we sit at the bar and have their soups, salads, mussels <my favorite> and a myriad of other appetizers. ESPN has "bar type" food with very nice burgers, fries, wings, etc. Crew's Cup @ the Yacht Club has appetizers too. Very nice atmosphere. For dessert, either the Dolphin Fountain or Beaches & Cream at the Beach Club.
For one stop dining at a reasonable price, look at Captain's Grill in the Yacht Club. Used to be empty, but lately, it's been packed. Menu looks reasonable with very reasonable pricing. Cape May is an all you can eat clambake at the Beach Club.
Don't forget too that the Epcot Food & Wine Festival will be ongoing from 25 Sep - mid Nov. You need park admission though.