The last month or two of recruiting was very stressful in my house. (For the parents that is. The boy seemed to take it mostly in stride.) It sounds as if your son is in a good position. In hindsight, my wife and I worried much more than we needed to.
One other note: When you're dealing with teenagers, a lot can change in a few weeks. My son decided in late August of his rising senior summer that he was only interested in one school. At the time, it was not one he had an offer from. Point being that it's a loooong time until ED applications are due, and things can change. Just try to remain calm (and flexible).