Went to Kenya last year and it was amazing.

While that's in a whole different region, I found Africa magical and life changing.

I lived the first 23 years of my life in Cape Town and have visited a dozen times since leaving in 1975.
If you want some info, check out what you can find at my web site(s)
There is much stuff at
http://swil.com/
and the newer stuff is
http://warrenswil.com/
I would certainly answer any questions you might have by email.

Take the cable car to Table Mountain and spend a few hours walking up top there. Not to be missed. We stayed at the Cape Grace hotel, right near the water and very comfortable.

Try to get to wine country -- very lovely vineyards and places to dine.

In Johannesburg, I highly recommend the Westcliff Hotel. An island of tranquility!

Be sure to get into the bush -- there are many safari camps, and you can fly to them out of Jo'Burg.