Should I go for:
2Gb (2X1GB) Corsair TwinX XMS2, DDR2 PC5400 (667), 240 Pin, Non-ECC Unbuffered, CAS 4-4-4-12
or
2GB (2x1GB) CorsairTwinX XMS2, DDR2 PC2-6400 (800), 240 Pins, Non-ECC Unbuffered, CAS 5-5-5-12
or
2GB (2x1GB) CorsairTwinX XMS2, DDR2 PC2-6400 (800), 240 Pins, Non-ECC Unbuffered, CAS 4-4-4-12, EPP
for my new machine, bearing in mind I'm going to overclock an E4400? I think I'm going to get a Gigabyte GA-P35-DS3R board, seems to have got some good reviews.