I just slapped on a set of Bavarian Autosport Sport springs with some lightly used Bilstien sports on all four corners. Man...what a difference. The BavAuto springs are great. Stiff, but not TOO stiff. I live out in the country where the roads are less than smooth, and Hartge springs would rattle my teeth loose. But as opposed to stock, the BavAuto springs I swear cut my body roll in half. They also lower the car about an inch. I'd recommend them.