Maybe a few, but people would need to know what you are going to use it for first. What are your priorities - wave jumping with a couple of mates or a safe family day out with young kids on board, inshore flat water or taking on the Atlantic, these sort of choices can give you very different answers.
I had the two brands you mention on my shortlist of three, and ordered an Osprey Vipermax, because in the end I decided that is what I really wanted, but would have been happy with any of the three and had very good responses from both Humber and Ribcraft and Humber was the cheapest of the three by some way. Many UK based suppliers couldn't give a stuff about export orders but that was certainly not the case and I had a significant amount of info from both.
Which model Humber are you looking at?
The thread covering my thoughts and choices is here which may be useful to you: If I wanted a new RIB....
and some of my boat in build and testing A Wolf is born...
Like you, I have to ship mine a fair old distance, so I haven't seen it yet but am very much looking forwards to getting it
As you are in Oz, make sure whatever you get has got pressure relief valves on the tubes