This may sound biased considering I work for a
tape reseller, but I would seriously consider laying your source footage and then a copy of your final show off to DVCPRO tape. While it's so easy to keep all your old footage and project files sitting on a hard drive for instant access, the potential rate of failure with that hardware as a long-term storage solution is still unacceptable in my opinion. Any time I store important data to a hard drive I make sure I also have another copy some place else. Tape is cheap, and it only takes a little extra time to make that backup. Then it's easy to burn your project files (minus the footage) to disc media and put it all on a shelf.