I need shocks and struts. They're entirely blown. I was looking at Bilstein HD series struts/shocks. What's the difference between the sport Bilstein and HD series Bilstein? Should I bother with the Orange Koni, or stick with the Bilstein all around? I'm not looking for adjustable, just looking for something to keep me planted on high speed runs, for a car with 3.73's (I do high way driving, that's why I didn't go for the 4.10's) full exhaust and mail tune.