The chances of any of them being long term financial successes...

The chances of any of them being long term financial successes is small in my opinion. That's not to say investors cannot make money during the pre-reality hype that is common with speculative mining plays.

At this point, from a technical perspective I would rate AUZ and ARL higher than I would CLQ. Also, I do not like the implementation methodology that CLQ has selected, i.e. EPC with MCC - this will be an immensely frustrating, lengthy and costly exercise and will end in tears. I suppose one should also be critical of CLQ for shifting most of the work outside of Australia - although that's a difficult discussion too have.