I have a 2000 BMW 328Ci and I am planning on getting some Eibach lowering springs are those good? Also the Pro Kit is a 1.2" drop in the front and 1.0" in the rear. The Sportline is a 1.7" drop in the front and 1.5" in the rear. Which would be best? Will I bottom out often with either of those, I have the stock bumpers no body kit.