Thanks for you reply - those are some good points. My main concern is the architecture of how this would be implemented - but I think the way you've laid it out, if that's how I could convince them to do it, would work well.
My other question is about the CMS piece. We have our web site split on two different CMS's, how would this impact, if at all, the archiving process? I just have a hunch it would be an issue, but I can't quantify that, so any insight would be helpful.