Western Digital WD2002FAEX Caviar Black 2TB 64MB SATA3 Desktop Hard Drive for $149.99 shipped after promo code LION2010. Here is a screenshot for your reference. It features 7200 rpm speed, 64MB cache, SATA 6Gb/s interface, and more. Note that it comes in OEM packaging, which means no pretty retail box and marketing materials but is otherwise identical. Most places have it for about $164.