On the Overland, at least:
At least in the US,
- ordering the diesel does not automatically get you QD2; you have to order it separately OR order OR2, which includes QD2
-one advantage of ordering and waiting, is if you order either the v8 or the diesel, and OR2, you get QD2 wo extra charge AND Select Speed, which is like a slow speed cruise control. If you order OR2 w the V6, no Select Speed.
Select Speed only comes when you have either of those two engines and OR2, so I am ordering that way. Plus, OR2 gives you the skid plates at a much lower price than after market plates, and without install labor or cost.
In the US, the OR2 package automatically substitutes the 18" wheels for the standard 20" Overland wheels, and, since the 18" wheels cost less, automatically gives you a lower price on the OR2 package, compared to the OR2 price in a lesser trim (i.e., limited).
For off road, IMHO the way to go is the V8 or the diesel, w OR2; then, sell the Latitude tires immediately, while new so as to get the best price, and buy a good All Terrain Tire.
Hard core offroaders would point out that there are after market skid plates that are beefier than the OR2 plates. My comment is that the GC is no longer a good platform for building a strong offroad vehicle and I am not taking it into extreme offroad situations. But, the WK2 GC is a much better road car. So, I am keeping my 1997 GC with Up Country package, and solid axles, as more of an off road truck, and ordering a 2014 GC with v8 and OR2, as a daily driver that will also do OK offroad. Not worth selling the 97, would not get much for it, but its worth a lot to bring along on a 4WD trip.
I don't know how the above might or might not apply in Oz, but I would check out Select Speed on the Jeep site.