Just about to buy a DVD burner, and am still painfully ignorant. I'm slowly educating myself on the many choices in this technology, but I have one question now: does anyone use RW media? I like the idea of re-writablity for backup purposes, but my experiences in the CD-RW world have left me less than confident in this format. Is the reliablility of -RW or +RW any better with DVDs? If so, whose media do you find reliable? TIA.