Definitely Kenya. If you prefer a quicker pace, Nairobi is full of nightlife and plenty of daytime attractions. The rest of Kenya is easily accessable via the SGR if you want a train experience or a short flight. You definitely should not skip the coast to experience the rich Swahili culture and many great beaches.

Be careful with South Africa. If you are Black, especially if you are Black with lots of money, this Government will love you here and you will love it here. However, If you are Jewish, PLEASE STAY LIGHTYEARS AWAY FROM THIS COUNTRY. This Government HATES anything remotely Jewish. Not even mountains of money will change their minds about this thing. Also, by far the majority of South African citizens are antisemitic, sadly! נעין

Come to Kenya. You'll enjoy our tourism sector.