I vote for Beach Club when it comes to down time, Stormalong Bay is the best resort pool area IMHO. You also have the dining options at Yacht Club, Boardwalk, Swan and Dolphin, it's a never ending supply nearby.
Have you considered BLT? We stayed there and loved it. You can walk to MK, you have the dining options of Contemporary on site, plus the other monorail resorts a short ride away, and BLT guests can use their own pool plus Contemporary's pool area, whereas Contemporary guests cannot use BLT pool.