Corsair XMS2 or Crucial Ballistix Tracer OC results opinion

Crucial Ballistix Tracer 2GB (2 X 1GB) PC2-8000 1000MHz Memory Timings: 5-5-5-15 at 2.2volts

Corsair XMS2 2GB (2 X 1GB) PC2-6400 800Mhz Memory Timings:5-5-5-12-2T at 1.8volts

Moving up to a ddr2 platform most likely a AM2 ee X2 cpu but still looking at C2D. I am going with 4gigs off the bat. The Corsair and Crucial are 19dollars different in price. I used to be die hard Corsair but many my brethren have gone Crucial. Might be looking for a lite to moderate over clock but performance per watt is watt i think is my main goal . So anybody have any of theses babies cooking? What kind of OCs you seeing? Any input is appreciated.

Crucial's web site says 2.2volts on all ballistix models just runs at 4-4-4-12 at DDR2-800 no command rate was specified by Crucial.