If a shockabsorber is that "great" and fine tuned, how can they cover such a wide range of work?
Yes i agree that bilstein are a very very good shock absorber. No arguement there. However, i feel maybe you should stop dismissing every other as "unsophisticated" and ultimately crap/useless.
The valve range on the Teins will work with the spring rates. Most kits can go up or down a rate and still be fine for most of the adjustment. E.g, if you went up a spring rate, you would find that the lower adjustment range would not give a great result, and down a rate the higher range of adjustments would not be great. Of course this all depends on other factors to, like bushes, swaybar thickness and settings (if adjustable), tyres (Road, semi-slick, slick). I run Tein Super streets in my car and race in several events (motorkhanas, hill climbs, events with tight twisty stuff where cornering and grip is worth more than brute power). My engine is stock, not big hp. My car is extremely competitive an often leads the class of other skylines and a range of other vehicles with big hp and suspension set ups like bilstein, Koni, or the jap stuff like HKS etc.
Just my thoughts based on my experience.