Network Attached Storage (NAS) Options

With the birth of our first child, we are taking absurd amounts of photos and videos. This all adds up to many gigabytes of needed storage, and my backup strategy for those files up to this point has been somewhat of a pain. What I need is a high volume storage solution, and I know that I want something that will support RAID mirroring. So I started to look at my options. After looking around for a bit I realized that with all my options, I really needed to take notes and determine pros and cons to each.

Here is a link to my notes. I'm leaning heavily to the build-your-own solution. It's mainly for the geek coolness factor - but really it comes down to the flexibility it provides.