YAY for a visit to the World.
I've toyed with getting DVC. It seems like an large outlay of money; but if you are going to be going every year, it will probably pay for itself. We decided not to because we live so far away. But somehow, we've managed to make it back to a Disney site very regularly!! It's one of the things that I would probably decide differently if I had my time again.
Are you still considering it? i'd be super tempted if my parents shared it in with me. With the age of your son, it may be something that suits your lifestyle.
Seems like a lovely set of restaurants to have ADRs in.