I am not that great with Firewalls so my question is should I get the beta? or should I just stick with the normal CIS until the new one is out of beta?
If you, by your own admission, are not good with firewalls, I would strongly recommend that you wait for the release version.
While the BETA is proving stable for many, there are still a few wrinkles (no software is perfect, BETA or release version) and IMHO, you would be best to wait until the critical wrinkles are sorted out.
LOL. My wife just asked me to show her a wrinkle that was not critical. 
Hope this helps,
Ewen 
LMAO!! Pretty funny dude