I suggest going to the dvc forum section and reading the SSR appreciation thread. There are some great posts in the thread with the pros and cons for each section of the resort.
I would suggest where I stayed last time which was Congress Park. It's the closest to Downtown Disney which was nice but still not a far walk to the main building. Once you're walking around the resort you realize all the sections have their benefits. It's a beautiful resort and the service was top.
I second Congress Park, but make sure they drive you over there upon check-in. It's not the closest to the main building, but it does have an amazing walk to DTD.