Thanks to you all for the replies.
VX KAT, I also did see that link under classified section as well, very informative, I will definitely follow up with those questions.
I am not familiar Isuzu Vehicross engine compared to other off-road SUVs. I know that Land Cruiser can last up to 400K easily (given the engine was proper maintenance).
I don't want buy the Isuzu and ended up like the Landrover Discovery...