Why not try a different type of hop in each kit to get your own preferances for hops sorted.This is gonna make every brew you make afterwards what you want rather than trial and error.- Only wish I had more fermenters when I started playing with hops! Dont boil the kit- only the dry ( or extract) ingrediants- add your hops to those-Will probably only need a boil of 30-40 mins max, as kit will supply the bitterness aspect of finished product. Would love to hear what 5 diff hops do to the same kit-or do a 2 fermenters with a couple of hop combos and the rest as single hop brews. I for one would use a premium or recultured yeast fo all of them rather than some kit and some premiums-That question of which is better no longer needs answering. Good luck