Spartan,

In a few weeks time it won't be as hot as it gets during Dec/Jan/Feb. Stay out of the bad areas, the locals will be able to guide you there. There are much worse places in LA/Miami/NY etc.

Durban weather is like Florida, Cape Town is more like San Diego, hot but much drier. If you are into wine then the Cape area is the place to go. The whole Garden Route (from Cape Town to Port Elizabeth) is the best. If you are into animals you must not miss the Kruger National Park although winter months are actually the best. Shamwari Game Reserve is just East of Port Elizabeth on the road to Grahamstown and is also a must see.

The Cape area has winter rainfall and the Johannesburg area has summer rainfall.

Your USD is strong against the local currency but watch that you don't get ripped off!

There are two branches of a hair replacement company, one in Cape Town and one near Sandton. They stock supplies and can assist with most anything you need.

Enjoy your trip!