I have an OWC thunderbay 4, and am looking to get some good drives with it to run a 4 drive RAID 5 array, hooked up to my Mac Pro (Late 2013). I was looking at 4x 4TB WD Red Drives, or Seagate's Equivalent NAS HDD; they are designed for RAID, but then I saw teh RPM was listed at 5400RPM? Isn't that notebook HDD speed? Am I better off getting WD Black drives? or better yet WD RE/SE enterprise drives? I am a video editor and looking to work with large files in FCP/Premiere/After Effects. I want the fastest data rate possible with redundancy so I don't lose any files if a drive crashes. Any thoughts on this appreciated.