Which os to choose?

[Starburst]

Just keep the server updated with updates using:

Code Select Expand

dnf --refresh update

If you are going to use Apache, just make sure it the latest version, as well as the ionCube loaders.
CWP only install 12.x, and 14.4.1 is the current version out.

Use the CWP Wiki and Forums (here).

Gotta toot my own horn, you also can use Knowledge Bases like starburst.help, and I think InMotion has a good CWP KB.
Another great source is AlphaGNU.com