Take a look at Facilis Terrablock. It can house a card that will connect to the tape library. The software could be Archiware P5 backup. There is also an archive module for that which is invaluable. It is all quite straight forward, durable and fast.
We are in the Twin Cities and could quote a system, but would want to talk about your workflow first, and ask a bunch of questions about how you do work.
What editing software do you use?
Tom at digitalpictures.com
Tom Grotting
Digital Pictures
Minneapolis