I'm thinking about buying a DVD burner to backup large data sets. I'm also a bit skeptical, and was wondering if anyone can comment on how well the technology works. I've seen my share of poor CDRW drives, and was never very impressed with re-writable CD media. Do the DVD re-writable media work, or are they flaky? BestBuy has got a Sony DRU-500A drive for $350(8-MB cache) and a Memorex drive for $250(2-MB cache). Anyone try these out? Any comments welcome.