From a friend of mine, no truck would give you a better service esp ferrying heavy construction materials than the Isuzu FVZ 10 wheeler. This is evident along msa road, thika, thika road, kangundo road etc. He Operates at mlolongo and has 2. The FVZ is also well known by customers so u wont do a lot of explaining, and spares are readily available.Avoid the Isuzu Giga. Ask around and do a proper due diligence. Best of luck.
TULIA.........UFUNZWE!