Hi, When I purchase dvd -r and dvd -rw the cost range for different brands are considerable. I am interested in getting higher quality video for my dvd backups. Is there really that much difference in video recording quality (i.e. the backup video having the same quality as the original) between one brand that costs twice as much as another. For example DVD Pro -r or -rw for 81 cents a disc or Ritek for $1.59 a disc. Thanks for your help.