Best Airline for flying domestically and internationally in South Africa?

Hello, I'm planning on booking a couple flight for a South Africa trip this year and just wanted to ask your opinions on which airlines are best. I'm mainly flying on domestic routes in South Africa, but I'm also planning to fly to Victoria Falls. The airlines I'm seeing are all around the same cost, so I am wondering if there is any preference on why to choose one or the other. The options I am looking at are: South African Airways, Cemair, Fly Safair, Airlink, and FastJet. Thank you in advance for your advice!