Hi there
There are some very good schools in SA. The standards of training are excellent and so is the environment in which you fly.
I did my commercial training at 43 Air School in Port Alfred and finished in Nov 2000. I am now flying for the UN in Africa.
The SA training syllabus is very similar to the British one. However the JAA have made it very difficult to convert any foreign license... have a look around on this forum to see what exactly is required.
43 Air School have a structured hour-building program for people who are doing Oxford's modular ATPL course, so they might also be able to advise you.
Best of luck
regards
Dirk