which GUI?

[Patrick Asselman]

Okay I'm hoping to get some solid advice here, after I heard that you 
even advise on emptying anal glands...

Ubuntu server 12.04.1 LTS
Running on a server in a rack at some hosting company
No physical access to the machine
Some people need to get access to do stuff on there, but they don't 
really know Linux, so I need a GUI for them
The GUI will only work via some remote desktop type system

What is the best to install on this system? I'm thinking of some light 
weight no-nonsense window manager with a graphical login front-end, 
something that transports well via VNC (or some other system that you 
may recommend?). If it feels MS-Windows-like, that is a plus (because 
the only users of this GUI will be the ones that don't know Linux).

Best regards,
Patrick Asselman