Wilderness Lodge or Animal Kingdom Lodge. Both are the least expensive Deluxe resorts, midway between the prices of mods and the more expensive deluxe resorts. Wilderness gives you boat access to Magic Kingdom (which, I'd figure with a 4 year old) you might spend a plurality of your time). Also gives you boat access to Contemporary, and boat/walkway access to Fort Wilderness with all the amenities they have.
Animal Kingdom Lodge is more remote, but it's an amazing resort, it's the closest resort to the Animal Kingdom (which I'd assume with a 4 year old might be the SECOND-most visited park), and what kid wouldn't love looking out the window and seeing giraffes and zebras?
Maybe your kid. I don't know. I'm not all up in your business. But if not, those are the two I'd consider.
Both of them have food courts, casual restaurants (2 at Animal Kingdom Lodge) and a Signature restaurant, with nice lounges for grownups, even if you have to do it in shifts. Great pools (I think AKLs are better), workout rooms if necessary, excellent themes, great views.