Hey aurelio, you might want to check out
CentOS. It is a rebuild of Red Hat Enterprise Linux, if you need something without support (which I'm assuming since you are running Red Hat 6). With CentOS 4 you should get 5 years of support for security updates, since that is when RHEL 4 is going to be supported 'till. I am using it as a desktop with Dag Wieers' repository added on (Dag's repository isn't really a good idea for server use). It also makes a great desktop Operating System.