See sig. The stuff rocks and overclocks like a champ.
I tried Mushkin, and Crucial, but not Corsair. The Kingston VC133/128 (uses NEC chips)seems to handle overclocking better from what I've seen... The difference is not gross though. If the price is right then get it. If not go for the better deal. I got my first stick for about $170 and later the other for $97 when the prices fell. ccitek.com and memman.com offer it for good prices I've seen.