Go for Innova and get its:
- Reliability; You won't go wrong here and toyota parts are readily available if they ever break
- Performance; Innova shares the same CRDI powerplant with the Hilux, and NLEX patrols use these pickups for utility as well as for pursuit of overspeeding cars
- Comfort; Its suspension uses springs on all corners which is well-known for comfort

For the technology we have today, CRDI powered vehicles are the bang of the buck if you're going to get a diesel powered vehicle. They're surprisingly powerful and fuel efficient. If you already have a list of candidates, go for a test drive on each of them so you get a feel on each car. But in your situation, I can only recommend the spacious and powerful Innova. You can also opt for Isuzu Dmax or Toyota Hilux if you need a really high ground clearance.