You are really looking at apples to oranges there. Th Isuzu VX is based on the 2nd gen 2dr Trooper platform with a few minor upgrades and a custom body that was 10 years ahead of it's time. Very limited production as well. Just a few thousand made and sold world wide. It has a real truck chassis underneath with a fully boxed frame. The rav4 is a cute ute. Not saying anything bad about the RAV4 it's just a different style of vehicle.
At your height a VX would be a tight fit. An Isuzu Rodeo or Amigo might be more up your alley fit wise. Most all Isuzu vihicles are very similar mechanically. There is a lot of parts crossover. They are all pretty capable out of the box. To use the VX as an example the chassis is Trooper and much of the firewall area and interior parts are from the Rodeo line. Each model does have it good points and bad depending on what yu want to use it for.
KISS Principle = Keep It Simple Stupid.
Your best defense against Murphy's law!