I dont know if you will find cheap coilovers. As the others said Look into some Bilsteins or Konis, and possibly lowering springs if you don't have them and want them. I agree that coilovers are nice for changes in weather but other then that most people i know set them and call it a day. I also know people who remove them for the winter so they don't rust or get stuck at a height. How aggressively do you drive the car and do you do any track days. If you like to drive aggressively and do some track days then do coilovers otherwise save some money. i have the koni single adjustable and they are great, with the dinan springs it lowered the car nicely and handles great.