Getting a digital copy of them isn't too hard, for I have all the CDs as lossless rips on my fileserver. So listening to them is never an issue — they are trivially converted to MP3s for my iPod, or played losslessly through my home A/V setup. And they exist as images, too, so I can burn a CD if I need to.
What I want to know is how the precious originals should be saved. Finding another copy is quite difficult (or near impossible), so they are fairly irreplaceable. The digital files get all the handling, and the fileserver is amongst several so losing one doesn't mean I lose the digital copy (yay for backups). But protecting the atoms themselves is quite difficult. What's the best way to protect these originals against theft/disasters?"