I have held off buying a NAS for a few years. With the Gopro Hero2, I’m needing an amount of storage that is bordering on incredible. Finally broke down and get a Synology DS212J. It’s outfitted with two 2tb Seagate Barracuda drives.
This unit offers a lot of options. I got it to export a NFS mount so I can transfer files off my production Linux server. Using NFS, it seems to average 11MB/s transfer rate. I’ve enabled ssh and ftp. I’ve found ftp to be the best way to store backups from my linux machines.
The synology also has several apps you can enable, such as Plex and BitTorrent.