Something to keep in mind here too people is that Red Hat products are upgradable from one release to another. Now, granted upgrades from one major release to another don't always go smoothly, but I've always found them to be repairable by hand if the update fails which sure beats the heck out of the typical reformat and reinstall required for MicroSoft OS upgrades.
So if tech support from Red Hat is important to your organization, consider updating when the support cycle ends for your version.
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Something to keep in mind here too people is that Red Hat products are upgradable from one release to another. Now, granted upgrades from one major release to another don't always go smoothly, but I've always found them to be repairable by hand if the update fails which sure beats the heck out of the typical reformat and reinstall required for MicroSoft OS upgrades.
So if tech support from Red Hat is important to your organization, consider updating when the support cycle ends for your version.