U sure you wanna talk about eibach's like that? Eibach is just as reputable of a spring producer as Steeda or Roush, and do you know the spring rate of the Sportlines? I was pretty sure they were at least 550lb/in, if not 600 or more.
Go with Fords C springs, there like $109 from www.gefracing.com and I have heard they are good from people who have them, with all the others your paying for the name.
well, the 170 i payed for my Eibach Sportlines have been absolutely great. My ride has stiffened a bit, and the stance is so much better in comparison to the stock height.