Good choice IMO! My dad's a dentist and mom's a hygienist. My dad could have taken out my wisdom teeth himself, but had the common sense to refer me to an oral surgeon friend of his instead. He knew I could not handle that kind of trauma at 16 years old, being awake- I have a low pain threshold.
Best of luck to you and your son! It will be far less traumatic to him to get it done once and have it over with.