in my case:

Koni Yellows w/ the best springs vs. TEIN SS Coilovers

The TEIN SS coilovers are good, but they will never handle better than a good Koni Yellow and spring setup. If you go to a large Auto-X, you will find a lot of guys using Koni Yellows on their cars. If you really want coilovers, then go for TEIN FLEX coilovers, since they are double adjustable...