See above for my suggestion. It might not be as cost effective, so it really depends on how important the material is. I'm archiving some TV shows I recorded that haven't been released on DVD. If I throw away my tapes and the discs won't play five years from now, I have nothing. So I'm storing...
As someone who works in broadcast and deals with a lot of video quality issues, I am extremely sensitive to issues like this. Just looking at the difference in an image from uncompressed video converted to DV format gives me pause, but then to consider that DVD is compressed a lot more over this...