On this subject, I think LeBron James could develop into a PF within a few years if he can improve his post game. He already has an eye for blocks, and a knack for rebounding. He is a devastating SF, but imagine if he was posting up in a better way too. If you guard him with a smaller guy, he'll kill you on the block, guard him with a bigger guy and he'll drop to the outside and blow right by him. He could follow a kind of KG-mould, except with longer range, more quickness and (dare I say it) more power.