South Africa boarding schools

[ForeignGal]

I am considering sending my sons to boarding school in SA for a varitey of reasons. At the moment we are thinking about Hilton College, approx 1 hour north of Durban, and Bishops, Cape Town. Being British with no connections in SA I wondered how easy my sons would fit in to the culture of private school in SA. One of my sons isn't sporty and I've heard thats a big negative in SA, and I've also heard that there is a high bully culture in these schools - is that completely inaccurate? More importantly I want to know how safe my sons will be over there. Will two 13 year old white british boys stand out, and are there things that one should know i.e. places not to go?
I think the lifestyle, education and culture wil really enrich my sons lifes and I am pro this idea but my hubby is completely paranoid about how dangerous SA is, or at least is preceived to be. I hope I have not offended anyone and any info would be greatly appreciated.

ForeignGal x