We use two of the Terrablock 12D over 2Gb FC thru a switch for 8 PCs and a Mac.
It is pretty simple to administer and whenever I do have a question on it, I can get an engineer on the phone. The system is low-maintenance and basically a huge disk that you partition and share among your clients. Unlike some of the other lower-cost SANs, you can run two uncompressed HD clients on it. For compressed video, you can have up to 20 clients.