My ideal scenario was this:
- Networked, so I can access files from any computer in the house
- Media streaming of all my music, videos and photos to my PS3, and devices I could potentially get in the future (like an Apple TV, internet radio, whole-house audio, etc.)
- Low power consumption, since by definition a device like this stays idle about 99% of the time
- Reliable, including ways to make backups of the data
- Accessible over the internet
A nice thing I discovered about the DNS-323 is that it is pretty much a tiny Linux PC, so it will be possible to install all kinds of tools onto it including media servers, web servers, and all sorts of other interesting hacks.
To help with power consumption and heat, the 1 TB hard drive I bought was a Western Digital Caviar "green" series, WD10EADS, which claims the lowest power consumption at only 2.8 watts. I might even buy a second one later, and set up the NAS in RAID 1 mode for even greater reliability.
Now to start copying all my files over!