I second biostud. Anandtechs roundup showed the samsung being the most quiet and coolest running HD. In terms of performance it was in the middle between the WD and the Seagate. In most games and real world applications we're talking about miliseconds though. I checked it all out, coz I had to make the same decision, and in the end bought the Samsung. It's been running fine for a couple of months now.