Taiyo Yudens are the best, but DVD+Rs are better than DVD-Rs. This disc model [YUDEN00T02] was named one of the five best blank DVDs ever made by digitalfaq:
http://supermediastore.com/taiyo-yud...s-r-media.html

I'm not too familiar with DVD-RAM discs. Are they re-writable? Write-once media lasts longer than re-writable media. This site says that DVD-RAM discs can be used much like an optical hard drive (I guess that means re-writable?), but that it isn't very compatible for video. Very few DVD players will play a DVD-RAM video disc (the video files are in VRO format). I didn't see any blank DVD-RAM discs on www.supermediastore.com I guess they are not that popular.
http://www.digitalfaq.com/media/dvdformats.htm