Good afternoon, I'm in the market for a DS1515+ to replace an old WD FireWire drive. I'm looking to have it hold my iTunes library (music and movies), iPhoto library, archived graphic design jobs and my time machine backup. The itunes library will be accessed by 2 iPads, an Apple TV and a Mac mini HTPC. I'll have it on RAID1 redundancy and separate the drive into 2 partitions (one for time machine backups and one for everything else). I have a few questions and need guidance. 1. What kind of disks should I get? I know WD Red would work, but am intrigued by the seagate hybrid drives. I plan on getting 4, 2TB drives. 2. What is the purpose of the RAM in the drive? Should I max it out? 3. Is this drive able to be accessed from outside of my home, if I need files on my laptop or if I want to watch a movie? 4. Any advice on the optimal way to set this up? Thanks in advance for any help.