Ubuntu server GUI

[Mario Spinthiras]

My 2p,

You don't need a higher layer on top of ubuntu or any other Linux
distro to handle your linux distro. The thought only complicates an
admin's life and is unecessary. As for a GUI , stick to windows if you
feel a GUI is appropriate. People with Linux have done just fine with
an "as is" approach to the UI and it's not going to change whatever
you say or do.
-- 
Warm Regards,
Mario A. Spinthiras
Blog: http://www.spinthiras.net
Mail: mspinthiras at gmail.com
Skype: smario125