Best 50-50 is probably the K60...... it does most everything well and you get tons of mi-Km out of them,........
The TKC80 is more of a dirt tire and you wont get nearly as many KM out of them but they are a bit better in the dirt and a bit less "road" than the K60.... I'm my experience, an average everyday guy will get about 6 K miles out of the front and maybe 2500-3500 mi out of the rear... Everyone is different and I've seen both of those numbers lower and higher....
On the other hand I got about 13500 out of my K60 front before I pulled it for a new one (for the CO Rally) and I got about 11K out of the rear...
We might start to see some good numbers out of that new Karoo 3 as well....