I would steer clear of a petrol truck, service stuff costs, maintenance.
Diesels are good on juice and are incredibly reliable and provide more grunt.
Auto is great, but if you get a problem, then that could be very costly, whereas manual boxes, in anything, are near bulletproof, and clutch plates seem to last forever..
Reliability, I would always go with Toyota, not only because of the engine, but also build quality and electronics. If you can find a second hand Revo, which has the latest engine design, that's what I would go for, it has a timing chain, not a belt, as the previous engine did, which had to be changed at 150kkm. ????