I really can't understand the reason Joomla is voted as the best. Yes, it is very good and in my opinion better than every other but not than Elxis.
Elxis is an open source PROFESSIONAL CMS and has many advantages in comparison with Joomla.
It is safer, it supports multilingual sites, it offers great back-end and much more....
Change Joomla, turn it into Elxis