I have to say I disagree with the quoted comment above. I went with the Koni/H&R Spring set up first and then moved to the coilovers (KW-V1). I was very happy with my decision when I made the swap. I took a 1200 mile drive with my family after installing the coilovers through the country roads of GA and NC and the car felt great.
Suspension has a lot more to do with your individual style and taste at this level in my opinion. I have owned it all and on many different cars. Some are harsh based on design (track use vs. daily road use). All my opinion but thought I would share.