Did you tried Pardus? It is a GNU/Linux distribution not as well known as Ubuntu or Fedora but a really serious 3 year project developed by Turkish National Research Institute of Electronics and Cryptology (UEKAE), which is under the Scientific and Technological Research Council of Turkey (TÜBİTAK).

They just released their third major version, Pardus 2008, so I thought, it might be good to mention about Pardus for people who does not know it.