If your car is a daily driver with some weekend warrior track stuff you might want to save your self a bunch of money and check out Road Race engineering grip springs.
They will give you the drop you want, the sportier ride and not damage your stock struts or shocks prematurely like a lot of after market springs will after a few months.
Here is the link and the price is right too!
http://roadracemotorsports.com/store...roducts_id=713
This would allow you to sink a bit more money into upgrading other suspension pieces or maybe upgrade to some better brake pads wider rims and tires to give you the extra grip to cut down your timed runs on the track or auto cross.