Thats what i was going to do. I was going to buy the Sport springs and put them on the S4 struts and see how that goes. Then later buy some Bilstein(or Koni) shocks and use the same H&R springs and see how that goes, and whichever works out better IMO i will keep and sell the other. Eventually, i am going to move over to some Coilover,but lack $$ to do so.