A distro will have a several gb of free software that comes with it. Also, a distro may be compiled for different type's of computer architectures. If you have a pentium computer, you don't want to download an iso file that has the letters ppc or x86_64 or i64 near the end of the filename. For SUSE, the 4th and 5th discs may contain extra kde and propriety software such a flash plugin for firefox.
The first cd may contain a list of what packages are available on the other discs. If not, there may be a list on the distro's web site.
If you live near a Barnes and Nobles book store, or one similar, they may carry the magazine "Linux User & Developer". This is a UK magazine that will have a different distro featured on each issue. The latest, Issue 61 has a DVD for Fedora Core 5. A previous issue featured OpenSUSE. I noticed that the computer section also contains a book/distro for SuSE 10.1. One of these may be more convenient if you don't have broadband.
Last edited by jschiwal; 06-29-2006 at 03:14 PM.