dont know what lowering springs to buy

[steves00ex]

I was wondering what the would be the best and lowest springs that i could put on my car. the only thing is I have 18 inch rims on it so i dont think i can go any lower than like an eibach pro kit ....... but i want it lower than that but still keep the rims and i dont want to do coilovers ,any sugestions would be greatly appreciated