OK what i meant was, what brand/model and/or what speeds your drives were.
i take your answer to mean that your CD-RW drive is a 12x CR-R, 8x CD-RW write speeds?
and what is your DVD-ROM readint speed ?
generally, i would recommend you replace the CD-RW drive with your new BenQ DW1620 and kep the DVD-ROM drive.
(that is unless you have special needs or preferences you didn't mention.
such as: you want to copy a lot of CDs on the fly.)
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
M.C. Escher - Reptilien