I would get all four corners taken care of at the same time. Some people have used the Eibach pro dampers (kit with 2 struts for the front and 2 shocks for the rear) with success on other springs. I think the Teins were one of the brands. That is probably the cheapest choice. Or you could opt for either the Koni Sport Strut or KYB AGX Adjustable struts. Like I said earlier, I would get shocks at the same time. And obviously form the same company. But use something that was designed for lowered cars, like the ones mentioned above.