KDE is so far the most stable and promising desktop enviroment for beginners and business users. It is well supported by community.
Original article by: Heath Matlock
The 2011 Member’s Choice Awards from LinuxQuestions.org has honored the KDE Community with “Best Desktop Environment of the Year”. In addition, Tech Radar has declared that KDE Workspaces are the best desktop environment. KDE innovation, performance and stability have particular appeal for users. Read more. Credits: http://dot.kde.org/2012/03/05/kde-best-desktop-environment-year