I'm fond of California Grill, Flying Fish and Artist's Point.
California Grill - open kitchen and lots of kids makes this a noisy, busy place. But the food we've had is excellent. Great view of the Magic Kingdom, but lots of people want to go here to watch fireworks, and sometimes the other guests make dinner unappealling (we go early and miss the fireworks crowds).
Artist's Point - quieter restaurant with an emphasis on game type food (buffalo, salmon), but fancy game type food.
Flying Fish - good fish dishes, smaller than California Grill, and fewer kids, but more busy than Artist's Point. I love the decor here. Food, I think, has gone downhill with a chef change, but its still good.