Well first off, you're going to need some serious cash for a nice suspension system if you don't want it half assed. I think the Progress Technologies set comes with a complete package including coilovers and struts. The Progress kit sells for around a grand. Or you can always just get some coilovers like Ground Controls and some Tokico gas shocks that will give you a pretty nice ride. Also, you will need a camber kit that will keep your car from bottoming out. Camber kits go for around 300 for both front and rear. Those are pretty much the basics.