I would choose Chef Mickey's and 'Ohana ~ I know from reading the boards that Boma is amazing, but 'Ohana and Chef Mickey's are must dos for our family.
BOMA!!!! It's like Jiko (best restaurant i went to in the world during my year there!) just a little "cheaper" but very tasty food! great considering it's an all you can eat buffet (i know "you americans" love them - i dont hehe)