Sorry for the late replies/lack of updates. XjoEnX, I dropped about $350 for the Koni STRTs, and they ride very smooth on GC sleeves with OTS rates. It's stiff enough to handle the corners, but smooth enough to where it's comfortable enough to drive for miles. I actually just did a 200 mile round trip from the Bay Area to Davis, and it was super comfortable. The best part about them is that they come with a lifetime warranty!
But my question to you is why do you want to swap out a full coilover setup for traditional shocks + springs?