I've been on the fence about getting a RAID type array for some time. I have a lot of critical data (irreplaceable photos, large CD collection archived to MP3, large DVD collection archived, etc) on my system right now. I currently have some on my internal 2tb drive in my 2010 iMac, some on a 3tb external drive. The internal drive is backed up via a Time Machine drive, but I really don't have space right now to back up the external 3tb drive easily/well. I'd like to set up a RAID array for both time machine backups and my iTunes music/video collection. I need to be able to easily stream the MP3s through my Sonos system plus to my AppleTVs which are how I watch the videos. I've been leaning toward as DAS for this setup given I've read a lot of issues using a NAS with video sharing through iTunes and AppleTVs. I haven't jumped on one yet as I don't have TBolt on my iMac and clearly thunderbolt is the way to go for a DAS. Am I thinking about this wrong? Will a Synology 1512+ work for my application or am I right to hold out until I buy a new 2012 27" iMac and get a Promise R6 or Drobo 5D?