Might as well get the newer WD Caviar Black 640GB
with 32mb cache opposed to 16mb. $5 difference, but they have a 5 year warranty opposed to 3, on Newegg at least.
Also OCZ Platinum
is cheaper and faster then the gold. And for that matter This OCZ
is much cheaper, faster, and has a lower voltage rating. Assuming you chose 1333. If not, still check around for better deal on the ram.