I would go with the regular Corsair, the CMX Pro runs at high speed, low latency, is more stable but the regular corsair is stable, low latency and fast. The average gamer wouldn't notice the difference between the two.
The CMX Pro will most likely require you to manually change CAS settings within BIOS also.
[size=0.5]Full Aluminium ThermalTake Case
AMD Athlon XP 3200+ *400 FSB* Barton (2.2GHz)
ThermalTake Volcano 11+ Xaser Edition Air Cooling
1024MB Corsair TwinX XMS 3200 (Dual Channel 2x512) 2-3-2-6
256Mb XFX 7800 GS EXTREME
2x WD Raptors (10krpm 8MB Cache) 36.7GB using RAID -0
Video Logic SonicXplosion 5.1 Soundcard[/size]