Hi.. need to buy Quickly one more 1 TB of hdd for my HDD Stuff. I already have 2 1 TB OF WD GREEN. i was thinkin of getting one more of the same brand or WD BLACK which is for 5600 . Can anyone know upgrading to WD BLACK will that make a lot of difference in performance . Dont want to buy Seagate as it has the maximum high rate of failures... kindly Advice..