Hi Guys, I am about to replace my old iMac 27 withe the latest model, in special for video editing with FCPX and Motion. Do you think is a good idea to get the 3 TB fusion drive and then use a usb 3.0 external drive (3TB) for time machine? I want to have a backup of all my videos. i am expecting to fill in the 3 TB with videos in about 6 months to 1 year. What will be the best setup for a fast editing experience and safe backup? Do you think I can get better performance from a NAS fro example? Thanks in advance.