sh404sef, anti hacker suite by OSE, but there's many more security products for joomla.
That's the whole point James, that it "needs" all those security products. Joomla is one of the more user friendly ones for sure, but it's definitely miles behind Drupal for security and features that are built right in such as user access levels that work without having to pay some other user that created a module for them. Joomla is miles prettier than Drupal by far, but no where near as functional.
Never tried dotnetnuke, looks just like an HTML site page there Janys, very nicely done without getting into all them billions of frills which get on my nerves LOL. All the beauty of an HTML site with all the functions of a CMS, that would be nice for sure, I'll have to take a look at that one.