I think it depends on your circumstances and what you are looking for close access to.
If you want to be close to the Carriage House, you want the Springs.
If you want to be close to DTD walkway, you want Congress Park.
If you want peace and quiet, you want the Carousel.
If you have a car, it really doesn't matter much where you are because you can just drive over. We stayed in the Carousel which is close to NOTHING (but a quiet pool) and it was fantastic. It was so quiet and peaceful and we just drove over to the walkway, if we wanted a stroll to DTD.