Depending on your budget and who the 3 "adults" might be:
** 2 connecting rooms at one of the value resorts. This has the advantage of two bathrooms, two TVs and a little more privacy.
** a 2 bedroom villa at one of the DVC resorts. This option provides 2 bathrooms, 3 TVs, a VCR or DVD, a washer & dryer right in the room, a full kitchen (equipped with refrigerator, dishwasher, microwave, stove, toaster, and coffeemaker as well as pots, pans and dishes/silverware for 8), a jacuzzi tub and lots of privacy.
** a room at one of the deluxe hotels that sleeps 5 or a room at the POR that includes a trundle bed.
If you can afford it, the 2 bedroom villas are just awesome and will spoil you forever. If $$ are a major concern, I'd go with the 2 connecting rooms at one of the value resorts.
Enjoy your trip!