While Passive Ninja is most comfortable using and teaching Joomla, if you have learned WordPress and want to keep it, the templates used to create the linked sites are also available for WordPress. While these sites may take an extra week, they can still be created in the same semi-custom manner as the Joomla sites. If your company wants to perform its own updates and maintenance, choose the system that fits you best: WordPress, Joomla, Magento, or phpBB.