As per the advice of Sam Strano, I went with the Koni STR.Ts and some Steeda Ultralites. Keep in mind my car is street driven only. Sam said the STR.Ts were basically the same as the Koni Yellows set to full soft. They are also similar in performance to Bilstein non-adjustables. The Koni Yellows are an advantage for a track driven car--they're adjustable and can handle a lowering spring with more drop and spring rate. Good luck finding them. They've been on back order for a while. BTW, even with the Steeda Ultralites the STR.Ts are a major improvement over the oem struts and shocks.