It depends on the metal used in the cd. The gold ones last much longer for example.
There is also another factor, the slower you burn audio the more robust the recording will be. I have burned audio at 40X and tried to play it in the car and it skipped all over the place. I record at 2X max now and it plays on anything. Why not get a huge hard drive and burn all your albums to that and then burn them to cds. If a cd gets damaged, simply burn it again from the database on the hard drive.
If your collection means that much, you could also get a tape backup and backup your hard drive to that, or another hard drive. The options are endless really.