So my iTunes library is starting to grow out of control in size (mostly due to my movie collection). I only use the Mac Mini as a server essentially, and all pertinent data and iTunes are on an external hard drive. I'm considering a storage increase, but am trying to figure out if going with a NAS is better, or a direct attached storage. I want to run some kind of Raid configuration so that I can keep a duplicate copy of my library, and I would like to have at least 8gb available. I have heard nightmares with NAS and iTunes, and I know there are also downsides to DAS as well (or rather limitations). Can anyone comment on their experience with NAS and iTunes? Any recommendations for a 4 bay NAS or DAS from current users?