Since things are mostly on sale on Amazon (Black Friday). I'm deciding whether to get a WD Blue 1TB for $59.67 or a WD Black 2TB for $104.67. I've done my math and I've calculated that 2 of WD Blue 1TB would be $119.34 and that would save me $14.67 if I buy a WD Black 2TB instead of 2 Blue's. The reason I'm asking is because I want to know if it's worth it to buy a 2TB instead of a 1TB because there is a HUGE sale going on right now. Please help.