[Solved] Best descktop pc8500 1066 memory

This is my first try at building a low cast gaming computer for my son. What would be the best memory?

MOBO - GIGABYTE GA-MA785M-US2H AM3/AM2+/AM2 AMD 785G
PROC - AMD ATHLON II 250 REGOR 3.0 SOCKET AM3 65W
VIDEO - XFZ HD575X-ZNFC RADEON 5750 1GB 128-BIT
P/S - OCZ GAMEXTREAM 600W ATX 12V CROSSFIRE READY

Any other suggestions?

If you have DDR2 RAMs on hand then an AM2+ mobo and DDR2 RAMs with an AM3 chip seems reasonable but since u starting afresh (i think) why not an AM3/DDR3 build? What is your budget and do u need LCD/OS?

I already have already purchased the mobo & it's spec'd out for dual channel ddr2. I also have the processor, power supply & hard drive. I have a lcd monitor, but will be purchasing a HD monitor in the future. Need to purchase OS, looking at Win 7, just not quite sure which one, since I am use to XP. I have never been on Vista, so don't know what to compare it to. If this helps, my son plays COD & WOW.

What is up in the air at this point is the memory & video card. As I stated earlier, for the video card I am looking at XFZ HD575X-ZNFC RADEON 5750 1GB 128-BIT. I figured I could cut some cost elswhere to go with a little better video card. At this point I amlooking for suggestions on RAM & video card. Kind of partial to ATI RADEON, unless you can sway me towards NVIDIA with some sound advice.

Thanks. That helped me out.