Probably not as much as the cost is worth in rims and tires. If roll control is the main issue just go to 17" and Z rated tires. Personally, get bigger sway bars, better shocks and change the front springs to progressive ones. Cheaper and looks more stock. Besides one of the side effects that biggerrims have that they don't tell you about is they crack easier the smaller dia rims. Bigger rims main reason is for the huge disc brakes they're using now.