I've had stock springs, cut SRT-6 springs, Eibach lowering springs, K&W's and now Ground Control suspension. No one makes coil overs for our car. The best you can do is a height adjustable suspension system. None of them are trouble free IMO. Decide what you want. Looks, comfort, better handling, etc. Be honest and we can point you in the right direction. I haven't found one that's a winner in every area.

Les