In South Africa cricket is broadcast on the state broadcaster, SABC, and Supersport, on satellite television.
SABC's commentators are pretty dire. Makhaya Ntini and Herschelle Gibbs are both pretty bad, but Neil Manthorp redeems them somewhat. Peter Kirsten also commentates for SABC but I think he only does the radio stuff, but he's also pretty good. Knows the game and is very enthusiastic.
I like all the Supersport commentators to be honest, for the WI series we had Haysman, Ackerman, Shaun Pollock, Wessels, Mbangwa, and Holding. My brother can't stand Pommie but I like him. Sometimes he states the obvious but he also knows the game and doesn't get over-excited.