If the D22 has had the improved parts or replacement engine fitted then I would definately consider one. Fairly good all round pick up.
Other pick ups to consider - all old shape:
L200 - see www.Hullfreedomtrail.com
they performed well on drive out to West Africa, with very few faults.
Toyota Hilux - great reliable truck but a little underpowered!
Mazda/Ford Ranger - good reliable truck
For the money you would spend to get the above you could also consider a Toyota Colorado/Prado 3.0td - would think a LWB 5 door model should have enough room.
Make sure whatever you choose is very well checked/prepped.