The more drop you have, the more road noise you'll notice that's for sure. Also, when a rock hits your underbody, it thumps a lot harder. But the ride is really smooth on Eibach springs.... So no matter what you're golden, just keep in mind the lower you are to the ground, the more chance of underbody drag, which if you live in a bumpy area, is not a good thing and will eventually cause damage to your underbody. But other than that.... the bigger the drop, the better your car will look and feel.