Does the target computer have a good internet connection?
If your internet connection is bad, then it's better to use the DVD because you will have more packages available locally (which means less to download).
If your internet connection is good, then you should install as little as possible from CD/DVD because then you can download the latest updates from the web. Therefore there would be little reason to choose the DVD and in fact you might even want to go with the netinstall
CD which Debian describes as:
Use Internet to download additional files during installation.
These small "netinst" images can be downloaded quickly and should be recorded onto a CD/DVD/USB disk. These allow you to download only those Debian packages that you actually want, but require an Internet connection on the machine you are installing Debian onto.