Are either of your daughters animal lovers? My favorite resort is Animal Kingdom Lodge. You can get Savannah view and see giraffes, zebras, ostriches, gazelles and other African wild life right from the room. The biggest downside is that this resort is the most distant from Magic Kingdom and EPCOT although it is the closest deluxe to Animal Kingdom.
Also, if you are using Disney Transportation instead of having your own car, you are dependent on Disney busses. I like them myself (anything beats driving on vacation for me) but others find them inconvenient. They are dedicated to the Animal Kingdom's two resorts (Lodge and Kidani Villages) but transit time, especially at busy times, can take awhile.
If you are concentrating on the Magic Kingdom, I would say either the Polynesian or Grand Floridian which will give you access to the monorail and boats to reach the Magic Kingdom. If you have ever visited Hawaii (Oahu), you will find that the Polynesian has the style and flavor of the Hawaiian Village in Waikiki. Grand Floridian is a beautiful hotel with a turn-of-the-last century feel to it.
Another charmer is Wilderness Lodge. It evokes the National Parks rustic feel and, while not on the monorail, still provides efficient access to the Magic Kingdom (via bus or boat).
If you think EPCOT and Disney Hollywood Studios will be your preferred parks, you have five hotels from which to choose: Beach Club, Boardwalk, Yacht Club and the Swan and Dolphin. The Swan and Dolphin are not Disney owned/operated but they are part of the EPCOT resort area and offer a few perks that other non-Disney hotels provide (primarily location and use of Disney transportation). They also seem to have a variety of discounts that Disney does not have (although Disney has discounts they don't) so it is best to check out each to see which suits your family's needs best.
Happy planning!