Are you interested in watching DVD's on your computer screen? If so, buy the DVD-ROM. It will also function as a CD-ROM. If not, a regular CD-ROM will be sufficient.
With this in mind, instead of having a CD-ROM and a DVD-ROM ... how about a <i>CD-RW</i> and a DVD-ROM? Then you would have two optical devices with different kinds of functionality. The CD-RW for backing up your computer programs, personal files, burning music CD's, etc ... and the DVD-ROM for playing games, listening to audio CD's, and playing DVD's.
Toejam31
<font color=red>My Rig:</font color=red> <A HREF="http://www.anandtech.com/mysystemrig.html?rigid=6847" target="_new"><font color=green>Toejam31's Tantalizing Tantric Toy</font color=green></A>
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<font color=purple>"Procrastination on your part does not constitute an emergency on my part."</font color=purple>