Quno's given you some really good advice. Me personally with mine I tend to start with their outside defense since the main thing I want him to be able to do is guard whoever he'll be matched against no matter what defense scheme I choose. I like the guy's height at 6'6" The really wonderful thing is once he's an awesome SF when he ages where he's too slow to be a SF he'll be a legit backup PF or SG
Good luck