I got the WD 10000CSR Eco-Friendly SATA Hard drive at Best Buy today for $259.99 + Tax. I just installed it into the TiVo HD (652160), its the best drive I have ever seen for a DVR. 1) No noise that I can hear, even close to the TiVo (I did not run any acoustic software) 2) Drive runs cool to the touch, put the cover on and after an hour the SI temp was 38C, with the standard drive it was 48C !! what a drop in temp. 3) HD record time is 144 hours; basic record time is 1338 hours. (super size turned on) If you can find any of these drives at Best Buy this week get one. I would call first as only one store in CT had any (3) and i took them all. I will be putting the other two in friends TiVo-HD. Of course i can't tell if there is any long term problems but for now its great !!!