I bought a second hand set of Cusco Zero 2's at Jap Performance 2 years ago. I have found them absolutely brilliant. I have them set midway for everyday driving, which is about as stiff as standard STi Springs, maybe a tiny touch stiffer at worst. A quick wind up on the dial on the top of the legs to 4 or 5 and you are ready to hit the track.

Although last year at Brands I didn't even bother winding them up and left them as per my usual setting and they drove really well.

I would say they are well worth a look