Thanks for the links, Alex. +t
Having read through them, my next question is this: Besides fitting more music on to less media, what is the benefit to my storing masters on DVD?
A benefit is that DVD can store explicit source information in the file system and also you can have menus with the song list. (I know that you can use CDtext but I don't know anyone who uses that regularly). If you take photos at shows or have images you like, you can author a disk with an image slideshow to go along with the music.
Another thing (which may not be useful to many people), is that every CD transport model has different offsets, so there is really no way to reliably rip a CD and validate against a known fingerprint across platforms. A DVD uses a data file format, so if you want to test the finger print of a DVD, you can sum the files in the DVD file structure to ensure integrity against a known fingerprint.