Well do you want the adjustible ride hight of the coilovers or the ride quality of the strait springs.
do you just plan on using them for the street or for Auto-X or drag? it is all up to you and what your preferance is. If you are want the adjustibility then go for the coilovers, but your ride will be harsh. if you need to know more then ask.
Educate then modify[/siz]