Pro-line is actually stiffer than sportline, lol, tein is good too, or you can try neuspeed they have a good drop too and a good price.
Like Tein S Tech is going to be running $250 ish to get + set up. And you should be getting close to a 1.5F and 1.7R drop.
There are also Skunk2s, they are close to a 2 inch drop and you can probably get them for $200 ish
Neuspeed Sports should get you 1.75F and 1.5R, and their race springs should get you 2.25F and 2.0R, and they are going to be less than Ebichs. I'm planning on getting them my self when summer comes.
You could also get the sleeves coil over, they are not actually coil over kits, just a sleeve you can put in between your springs and you can lower or rise the car. Its not something thats bad, but its not something thats good either. I know cars that had them, don't seem to be any problems, but they all told me they are not going to take the car to the track with that on.