another vote for Kona -- the Big Kahuna platter is awesome (and not that expensive - like $11.99) You get 2 eggs, any style, macadamia nut/pineapple pancakes, french toast, bacon, ham and breakfast potatoes.
We did Chef Mickey's breakfast buffet...food was good, but it is pretty hectic in there (will wake you up, that's for sure!) And we went early before it was really crazy busy.
Would do Kona any day for a filling, relaxing breakfast...and cheaper than the buffets, too, even with coffee & a tip, you're still at less than the basic price for the breakfast buffet.