DSE offers a nice spring/shock combo. Couldn't find it on the site though. Think it is a little more than $500 though. Plus they are drop srings. SC&C also has matched, drop, springs for $289 and Bilsteins for $90. Matching shocks and springs are important. If you wanted you could also buy the Moog springs, way less than the above 2, and buy some Varishock 1way adjustables that you could keep very soft when you go to the track. That puts you way under $500.