I bought an LG-NAS N2A2. 2T. RAID (but not 5 or hotswappable). Plug it into the network, install a bit of software, and you have a web server of your file system. OK, the web interface is something less than Windows Explorer, but for the occasional file while in remote parts of the world, it works fine from any Web Browser.

The backup software is too simplisitic. I haven't figured out streaming video or tunes yet, but it says you can do it.

Price is very right for home use.