I have a 320gb blue in my wifes computer, and a 640gb black in my pc. Honestly, go for the cheaper of the two (unless the warranty is really important to you) There is a bit of a speed difference, but you will more than likely not notice it. On occasion my wifes blue can actually out perform my black drive. Not sure how thats possible...but hey, can't argue with Crystal Disk Mark/HD Tune. I am fairly confident you would not notice the difference in a daily use machine anyway. I have read that the black is more reliable though, which IS most important to me. If you are really concerned with speed, buy a small OS ssd and a smaller blue drive for daily storage if your budget allows. Having a Corsair Force 3 I can say with certainty the...