I am looking into buying a new computer (most likely a dell 8400). I really don't know much about computers and their different configurations. To copy a dvd to dvd will I need two dvd drives? I was going to get a 48 CD RW and a 16x DVD+/-RW w/dbl layer write capability. Or will I need to get 16x DVD-ROM Drive + 16x DVD+/-RW w/dbl layer write capability to do so?..please help out and any tips for other customizations (processing, graphics, video card) of the computer would be much appreciated!