I'd go with the Crucial. Guaranteed Micron D9 ram so it will clock well. On a sidenote, I just bought some OCZ Gold D9 PC2-8800 ram (got it stupidly cheap on another forum) and I can't wait to play with it since my current ram tops out around 900MHz.
EDIT: Crap, I just noticed old this damn thread was..................
Intel E6300/Nouctua NH-9U w/dual 92mm Panaflos
XFX 680i LT
Patriot PC2-6400 2X2GB LL
2 X BFG 8800GTX in SLI
Enermax Revolution 620W PSU
ASUS 24X DVD/Seagate 250GB SATA 2/THermaltake A90/Windows 7 Ultimate 64