Nós consideramos a(s) seguinte(s) alternativa(s) perfeita(s):
Debian
Página Oficial:
http://www.debian.org/Screenshots: LinuxQuestions.org
Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian GNU/Linux provides more than a pure OS: it comes with over 15490 packages, precompiled software bundled up in a nice format for easy installation on your machine.
Ubuntu
Página Oficial:
http://www.ubuntulinux.org/Screenshots: LinuxQuestions.org
Ubuntu is a free, open source operating system that starts with the breadth of Debian and adds regular releases (every six months), a clear focus on the user and usability (it should "Just Work", TM) and a commitment to security updates with 18 months of support for every release. Ubuntu ships with the latest Gnome release as well as a selection of server and desktop software that makes for a comfortable desktop experience off a single installation CD.
(Esta distribuição possui também um "Live CD" que você pode usar para testar a distribuição antes de instalar)
Foi o que deu para mim