Well im looking at growing a big one pretty soon. Im going to be using atleast one 1000W HPS light, and im going to buy that 8 bucket WaterFarm Hydro setup. I know you said your going with soil, but look at hydro. If I were you i'd grow a mother plant, then take clones from that and then scrog them. Im going to be growing Green Giant x Ak-47, all feminized. Anyways, I deffinitally think that cloning is your best bet.