Don't go cheap on coilovers or you could be looking at a horrible ride quality. You can get ground control coil overs and an aftermarket shock like the kyb agx all together for aaround $630. If you just get lowering srpings, or coilovers and do not get shocks, it will work fine for a while but eventually (depending on how low you are) your stock shocks will blow. Also when using a stiffer spring rate with the stock shock, the ride can be a little bouncy since the shock cannot control the spring as much. I have ground controls and I love em, real easy to adjust.