Depends on what you'll be doing with your car. For a daily driven car where you still want some comfort, i'd go with the Racing Beat street springs. The Konis are a EXCELLENT choice though, thats what im running. The Ground Controls are good, thats what spec Miata runs, and for what it costs new, its not bad at all. The highest recommended spring rate for the GCs on Konis is 450in./lb. Don't bother with the Tein S-tech springs or any other off brand stuff. Also, the RB springs don't slam the car, its a mild stance... i have pics of my old 96 Miata with a RB/KONI setup with the Konis on the low perch setting www.cardomain.com/id/droptopdrifter