Hi I am new to mac and looking for a fileshare solution for two iMacs working with a lot of photos. The need is 2TB today with a calculated need of 4TB in one year. I want Raid1 or 5. Would the best choice be a NAS (QNAP, Synology, Drobo, or Lacie) or should I choose a MacMini with some kind of disk exclosure (firewire)? I also need a backup plan for the "fileshare" solution but maybe some big usb disks could do the trick? Comments? Recommendations?