Get this RAM. It's new from OCZ. Suppose to be a great OC'er with low latency:
OCZ EL DDR PC-4000 2x1024MB Dual Channel Platinum XTC
OCZ just launched this low latency DDR500 or PC4000 2 GB DDR Dual Channel memory kit. Officially called the OCZ EL DDR PC-4000 2x1024MB Dual Channel Platinum XTC, it comes with two 1 GB DDR500 (PC4000) modules with 3-3-3 timings.
With a 2.8 V voltage, this kit also has OCZ's EVP (Enhanced Voltage Protection), where you can change the module voltage up to 3.15 V without voiding the module warranty. How's that for overclocking? This is truly the best 2GB dual channel kit I have seen to date.