i assume you have coilover's then..
but
i'd lower it the same so the car looks level if you can, and ur tire's and rims will let you, but if not. . just lower it enough so that it looks smooth enough to the wheel arch.. don't worry about if it looked to high in the back from a distance
but its all ur preference. . . . i don't think u'll be ripping off ur body kit though. ..