Boma's is a terrific buffet....IF you like to try new things, if your family prefers fried chicken and mac and cheese and thinks new spices should be banned, then opt out of that one,
The food and service at Kona's is also excellent, but not much atmosphere.
1900 has characters and a decent standard buffet, so if you want entertainment with dinner it is your best bet. Personally the characters aren't a big priority for us anymore so I would drop 1900....the others have better food IMHO.