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.
