If you got the money for them I suggest to buy a CD-writer, DVD-writer, and DVD-player.
Because as already stated:
- DVD-writers a terrible for backing up SD>2.8/2.9 and SecuROM new,
- DVD-players can read/rip DVD's much quicker then a DVD-writer,
- most DVD-writers burn slower to CD then CD-writers can.
If you don't have the money go for a Combo-drive.
I have a DVD-player, DVD-writer and 2 CD-writers.