So Newegg has a deal going on now where I can get two 2TB Black drives for ~$240 or one 6TB Red Pro for ~$280. I need to get an external drive because my internal is full (surprise surprise...). I have a two drive USB 3.0 docking station hooked up now, so I can handle the two black drives if I get them. However, after looking at the specs for both the black and pro (128 MB cache, 7200 RPM speed), I think for an extra $40 for 2 more GB and to have on a single drive is the better option. Thoughts?