You could get the Energy Suspension bushing kit for them. They creek sometimes when it's cold, but they stiffen up the suspension very well.

The Konis also allow you to lower your car depending on which perch you use on the strut. My fronts have 3 and the rear have 5 (I think, might be vice versa). They're very well designed.

 

as an autocrosser, koni yellows are the single best part I've put on my car.