I would suggest Epcot the first morning, do all the stuff in Future World and have lunch in the World Showcase. Do MGM in the afternoon, dinner there and Fantasmic.
Next day, hit the Magic Kingdom in the morning (do the mountains, Pirates, Haunted Mansion) don't forget to have a Dole Whip and then head back to Epcot in the afternoon to tour World Showcase. Have dinner there or at the Boardwalk, stay for Illuminations and then head to Pleasure Island.
Next day - go home and sleep for 3 days.
Have fun!!