[lxc-users] LXC with X, specifically KDE v. VM

[TuxRaiderPen]

I am in a situation where I am looking to possibly use LXC as a way to run ONE 
specific program that needs an X desktop.

What I am comparing is LXC v. my normal method a VM. 

Why do I need to run one program... email.  I only use KMail, but since 
changes to that program are not to my liking (outside the scope of this list), 
and I would like to upgrade my main box to the latest ESR release, 14.04.

BUT I need my Kmail! (Thanks, but I am a Kmail only person, no other program 
meets my approval, thanks.) 

I would Xephyr to the LXC container

The setup would be

LXC from 14.04

LXC container with the last normal KMail, I think 11.04/11.10? with X, and 
then I just Xephyr into it, basically it creates a window that has my email 
running.

I get to keep my setup, and emails, and none of the issues with the 
"improvements" of KMail2.

So comments in re LXC v. VM to do just one program.