Jim Green boots are a top quality leather product, or so I'm told - I haven't owned a pair yet. They're made in the KwaZulu-Natal Midlands, and can even be ordered online. And of course there's K-Way, the Cape Union Mart brand.
Hitec has a wide range of boots. Their synthetic boots are typically very comfortable (more so than leather boots) and don't require much wearing-in. Synthetic boots definitely aren't as durable as leather, though, and unless they specifically say waterproof, they're certainly not, although even leather boots or synthetic "waterproof" boots are seldom really waterproof after extended wetting. I would recommend Hitecs over leather boots for the novice or occasional hiker. Avoid the Hitech Utah, though. I had a pair for casual use, but they were definitely not tough enough for real hiking.
For the pro hiker with tough feet, consider going for a leather boot. Various options are available, some imported and some made locally. I'm not familiar with the brands at present - for a while I had a pair of Dachsteins. They done a lot of distance in all sorts of conditions. At the moment I'm using a more mundane pair of Hitec boots.