If you are running a production server, you should probably consider the Red Hat Enterprise Linux line. Edge Server (
http://www.redhat.com/software/rhel/es/) or Workstation (
http://www.redhat.com/software/rhel/ws/) should probably meet your needs.
Both of these distributions are certified to run Oracle--meaning you can get support--and also have long end-of-life cycles. So, you can be assured of getting updates and patches for a number of years.