H&R products are top notch. I have used them in many cars; they are in one of my cars now, and the other one has a Bilstein/H&R sport combo.
I will assure you that the spring rates of the H&R coilovers will be higher than the KWs or Motons, as that is always the case with H&R. They design their products for the track, not for the street, so they are usually always the firmest.
I only use H&R suspension components as I firmly believe they are the best. Search around, you'll rarely find anyone saying anything bad about H&R.
- Anthony