The only CD-R manufacturer I've had pretty much a completely good experience with is TDK, but I haven't tried discs from many manufacturers. Taiyo Yuden and Mitsui are also generally held in very high regard. Most CD-R brands are not sold by manufacturers, so quality can vary even without changing brands. As a result, there is a lot of conflicting information about which brands are good. Imation, for example, has sold media made by TDK, Taiyo Yuden, CMC Magnetics, Ricoh, and Kodak.