Every vaper has a different style. With that said, he really needs to shop for himself. Give him some tutorial, or, if you have a B&M nearby, take him there for education. Don't let them push a hasty impulse buy, though!
Maybe buy him a gift certificate from your favorite vendor?
Introduce him to ECF and insist that he do homework here to arm himself with information in order to make a knowledgable decision.
Every device is going to have good and bad reviews. Ultimately, the decision should come down to the individual vaper. Everyone upgrades from whatever they start with.