Depends on what your boys like...at that age it was super heroes, etc for my boys.
If your boys love Dr. Seuss and super heroes the place to go is Universal's Islands of Adventure..they will love it.
Sea World is always a perfect day and my kids love it to this day, they have been going since they were your boys ages and they are all mid 20's now.
Goofy (mini) golfing was always a family activity whenever we went out of town. In orlando, they have the Pirates Cove courses, or on Disney property I would recommend the winter/summerland course near Blizzard Beach. Christmas themed, lol, very cute for the kids. Lots of fun to play.
As far as a water park, Wet and Wild is fantastic, if you want to do a disney water park I would go to typhoon lagoon.
If you are going to try and fit a disney park in there..if you have never been to disney you must start with the Magic Kingdom, if you have been to disney before then I would choose a different park.
If you decide to do Islands of Adventure..and outstanding park and Sea World, with a water park/goofy golfing day, then maybe, just for a touch of disney you could choose a disney character meal in one of the disney resorts to end your vacation with.
That would be a very full and satisfying vacation for 3 days!
Good luck with your planning.