mobilio - 11:46 am on Sep 18, 2012 (gmt 0)
I suggest you take a look at their features, see which suits you the best and also try them to see with which one is the easiest for you to work with. The ones i've read about here and in other forums that have very positive feedback are WordPress, Joomla, ModX and DotNetNuke but i've only used WordPress so i can't be of much help. For me i tried WordPress first and i haven't looked for another since. It is easy enough to use.