J.C.
my suggestion would be a club med. For boys that age there are so many things to do and so much fun to be had by the whole family. you could try ixtapa in Mexico. The younger boy could do the day camp and do arts and crafts, swimming, games and the older boy could do the bigger water toys and older kid/adult stuff. And the great thing is that your vacation doesn't have to revolve around going to restaurants for meals because there's always a buffet so you can stop in and grab a bite without it having to be a big deal.