Good stuff in that link. It also shows what a broad topic this is, with over thirteen thousand threads in that one forum. There is no one right answer for this one. Everyone goes through a lot of trial and error. What works for your son may be quite wrong for you or the next person. Whatever you decide on, you need a good belt first. The best holster in the world won't be a very satisfying carry experience without a good belt to hang it on.