What is the best Linux distrib to run Armory and other 3D applications, the better for 3D ?
I don’t really have much of an idea, but Ubuntu has a flavor called Ubuntu Studio that comes setup with creative tools and some small optimizations like a low-latency version of the Linux kernel. Other than the kernel I’m not sure if it really does much else other than install extra software for audio/image/video development, etc. You might want to look at it.
Ubuntu or Xubuntu.
I like Xubuntu because of the Xfce desktop environment and don’t like Ubuntu because of the Unity desktop environment.
Do you mean in regards to GPU performance?
Ubuntu or Linux Mint are generally the simplest in regards to avoiding any terminal commands and using a GUI to make changes and add drivers, software but that’s nothing to do with 3D.
Arch/Manjaro and Fedora have more updates, faster to receive minor improvements.