Hi Musketeer,
My advice would be stay away from those Cafeteria dining options!! They do have a lot of selection and they are close, but the best thing to do is go straight to a park and eat there, or grab a snack and eat at the park. For its price, I thought the Pop Century was ok, the food was alrite, better than i expected but it doesnt compare going to eat a nice full lunch somewhere else. After you've had lunch/breakfast at a REAL restaurant you'll never go back. That's what happened with us. And if you have the dining plan, take advantage of it and explore!
The best lunch we had was at Boulangerrie Patisserie in Epcot France obvoiusly. I had the most delicoius and fresh turkey and cheese sandwich. Simple, healthy but sooo tasty. And they have the most amazing desserts, if you do check it out, make sure you get the Napoleon for dessert! hmm mmm
Hope this helps