You`re running 800lb/in front and 225lb/in rear springs with $27 KYB shocks? You`re WAY underdampened, no wonder it rides rough. You`re probably bouncing off the bumpstops. You could also drop the front spring rate 150lbs/in and not give up any street performance. Install a GOOD set of performance shocks, at the very least Bilsteins and you`ll get a huge improvement. To really compliment higher spring rates you should have adj. rate shocks like Varishock or equivalent. Start firm and back it off until it rides/handles the way you want. Mark SC&C