The Jabiru doesn't have the lockable compartments, whilst the Uluru & Kakadu do have them, however the Jabiru can be optioned up with them
That what we did ours - Started with the basic Jabiru and optioned up with the features we wanted off the other models and worked out cheaper for us along with the "show special" deal too. Went with the lockable sides, 16' tent, extended drawbar, XT suspension, extra awning walls plus a couple of others. The only things that we've added have been an extra 100ah battery that slot slotted right in, fridge, and a set of solar panels from Mandrake.
The only thing I want to change on mine is the small 240v fluoro lights that came with it. Currently I have to run an extension lead from the inverter/electrical cabinet to either light - planning on changing them to a couple of 12v led strips in the main tent over the bed and the floor areas which will be hard wired and another couple of led strips in the annex over the kitchen and undercover area. Hardest part will be keeping it up to a standard that reflects the rest of the trailer.
Overall we couldn't be happier with it and don't plan on selling until its time to move to a smaller trailer.