If I were using my dining credits I would pick a character breakfast. Some of the table service restaurants mentioned are good, like The Wave and Kona, but they are also reasonably priced when compared with character meals. We save The Wave and Kona for when are paying OOP.
Boma has a wonderful breakfast buffet (but not as expensive as character breakfasts).
Tusker House is very good, too. We like Cape May and Ohana, also, but they can cut into park time.
If going to a park, I might try to get a pre-park breakfast at The Crystal Palace or Akershus or Garden Grill, but you will have to get lucky with reservations to get one of those. Certainly possible.