http://www.engadget.com/2011/01/05/hita ... -dvr-near/Up to 2tb - "The new CinemaStar 5K2000 drives are nearly silent at 2.4 bels during operation, draw only 4.2W or less idle power, and generate less heat, which are all critical factors when designing environmentally friendly digital video solutions."
Up to 750gb - "With its reduced size, 0.5 watts (W) low power idle, 1.5W power during read/write operations, and barely audible 2.3 idle bels, consumers can enjoy smaller, quieter and more power efficient DVR solutions in their bedroom or living room with enough capacity to store 187 HD videos or television shows2."
Hopefully these drives end up being as good as they sound (or don't sound).