You can go either way and have an extremely successful team. I think what's more important is to build in your sf's skills to complement the rest of your team -- i.e. if you have a bunch of good outside shooters to go with him, probably makes more sense for him to be more of an inside threat, and vice versa. Especially in DI where the player should be better overal, it's nice to have versatility where the guy has some ability both inside and out.