In a nut shell, if you are out to get the best overclocking memory money can buy I can't see how you would be disappointed with the CORSAIR XMS3200 CAS2, the speed is excellent, it's rock solid, well packaged, comes with free heatspreaders and a lifetime warrenty, I can't see a bad point about it, it really is that good.

They said it better than I can at this time of the morning. :)  Full review & stuff.