All good points.....Bro, in my opinion, I'd keep bulking and enjoy that metabolism of your's until you hit 22/23. Once you get there, then I might start thinking of cutting up. But remeber, as you add quality mass, your "%" of bodyfat WILL be dropping as you're adding muscle to your frame, dropping the "%" of fat you have. Also, this will help increase your metabolism, making it EVEN EASIER to drop fat once the time comes. Just remember, unless you have a GREAT metabolism, then don't overeat on your bulking diet. I did that and it was killer getting rid of the fat. Just eat LOTS OF CLEAN FOOD FOR THE NEXT 5+ yr. this is the key your are looking for!!! Good luck bro