I started archiving my CD collection to DVD, too. I didn’t put a lot of thought into it at first, but here’s what developed after a few backups:
I rip a CD to WAV + CUE combination with Exact Audio Copy (corrected read offset) and then compress it into a self-extracting multi-volume RAR archive (25MB volumes + recovery info). When I have enough RARs to justify burning a DVD, I record them to two different DVD media stored in different locations. I tend to use MCC-004 for one copy and T02 or MAXELL-002 for the other.
This isn’t an elegant or complex solution, but it works for me. I don’t get quite the compression that FLAC offers, but my archive is self-extracting, lossless and in a pretty universal format (16-bit signed stereo PCM). When the archive self-extracts, it checks the contents’ CRC… and any damaged volumes in the series can be copied over from the backup disc if needed.
Anyone have a better way to backup their CDs? I’d love to hear alternatives.