If you are thinking about MK after breakfast, in addition to Kona, you may also be interested in Chef Mickey at the Contemporary (not sure if you have kids, but its a Mickey and friends character buffet - and yes, the times I've been there, we were just adults!!), or the 1900 Park Fair in Grand Floridian (also a buffet character buffet - but great! Again, our party was all adults). These are also on the monorail, but you could walk from MK to the Contemporary (and back) rather than waiting for a crowded monorail that stops at the other resorts and the ticket center.
Personally, I like buffets as you have more choices and can get in and out at your own pace, rather than waiting for service.