1 All CD-RW have different burning quality . Benq and Lite-On have not the better writing quality . And I think Benq drives have more limited support for medias than Lite-On drives !
2 Medias quality is important also . With some media you 'll always produce errors ( i think it's the case for Imation media for example ) . Best media i had used : Mitsui , Verbatim , Hi-Space .
3 The part which is written on the media is called dye , dye are adapted to some burning strategies ( short strategy : fast burning , medium strategy , long strategy : slow burning ) . Perhaps your media fit more with short strategy .
To know this your burner can read the media ATIP . Most burning software have some utilities to read the ATIP ( some versions of Nero CD Speed for example ) else some small software fulfills this task .
dye are Cyanine , Pthalocyanine , Azo .
You already have a burner , try to find the best combination with CD/RW and media . Perhaps you could find useful info on cdfreaks forum . They have a lot of topics about media ( http://club.cdfreaks.com/forumdisplay.p ... forumid=33
) and they could help you more than i .