I have been researching what shocks/struts to get, but all I can find is springs/struts with new springs. I really want to keep my stock ZHP springs so that is not really an option. Can I run Bilstein Sports or Koni's? I am hoping to spend around $600 or less. This is for my daily driver that will not see much track time/auto x's except once or twice a year, but I drive 100 miles round trip so I would like something with a lifetime warrenty like Koni or Bilstein. Any help would be great thanks!

Beau