Well a lot of people get CoilOvers which are springs that you can adjust the ride height over, I think they have like a 4'' span or something.

But for actual function you should only lower it until you get rid of fender gap or even have a little fender gap, so like 2'' tops. Also once you get below 2'' drop you need a camber kit since your wheels will stick out, and they are like $150 supposedly per wheel. But you can just use washers for the back 2 wheels. Keep that in mind.

If you get springs might I recommend Neuspeed Sport Springs.