To be specific (Possibly to such a point where it becomes pointless...) CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model TWIN2X2048-6400PRO. (Copy paste, ftw.)
It has gotten entirely good reviews on Newegg, and was currently twenty dollars off. (Normally $89 dollars, I got it for $69) It sounds like it is incredibly overclockable, and seeing as I plan on doing that, memory that can handle it is a good thing. (Liquid cooling, thank you very much.) I did check the QVL list and it looks like everything will work. I'm not getting four gigs, entirely for one reason. I don't have a 64 bit OS. Which is stupid, because I have a 64 bit processor.
All well. Life goes on, I'll upgrade the OS eventually. Maybe.
Thanks for you recommendations and help everyone, I haven't yet made the purchase, so say anything you want to before I do!
Finally, to Nocturne, you make me cry. One of my favorite hobbies is adding new things to my PC, so I am quite knowledgeable about these things. Two things I know, lots of Mobos will only run certain kinds of ram (PC2 5300, 6400, whatever.) And also, asking fellow geeks for advice is good. Because a lot of them are probably smarter then you.

(Last bit wasn't pointed at you. So don't get offended. The Mobo one was.... But not insultingly....aww, whatever.)