I'd strongly recommend against buying K-Sports, they're pretty poor quality in terms of performance and durability, hence why we stopped selling them a long time ago, Spax are MUCH better for the money, and if you want some really, genuinely good coilovers then spend the extra on KWs.
Incidentally we've done some testing with the Supersports, they're a good setup, ideal for fast road and amatuer level drifting. For serious competition I wouldn't recommend them since they're a little soft, but they do feel VERY nice and very composed on the road. Fantastic value for money!!!!