How about both?After reading this fairly long thread, it's amazing that some folks still think backing up to Bluray discs is better than backing up to external hard drives.
If you think backing up hard drives to Bluray discs is better and safer, please by all means do so. The main thing is that you're happy with your choice. After doing that for a while, don't be surprised if you end up backing up to external hard drives.
Good luck,
Sky