Duckingfast...good on you mate.
Moving is not easy but I can only tell you that once you leave you will feel all of the stress of SA lift. You will be surprised on how all of the aggression, crime and all of the other bull is being carried on your shoulders.
It will take time for you and your family to settle, usually the kids settle quicker, within a year you will looking back and only remember the good parts of life in SA...and wondering if Jetnut will be turning off the lights.
cheers and good luck