I have H&R on Koni reds, and I like the way it handles. It took a while to get it dialed in, but it holds pretty well around corners. How low you want it depends on how you drive I guess. The previous owner of my car had this setup installed, and he DESTROYED the undercarriage. The subframes are smashed, the downpipe is smashed, and the entire exhaust is shiny on the bottom. Any lower and the impacts would have probably torn the subframe off the car (okay not really, but bent the hell out of it). All that damage, and this is one of the more moderate lowering springs!