Bear in mind what you see now and what you will see in a years time SHOULD be different, all airlines have/are recruiting and have a long pipeline of training to complete so crewing SHOULD settle down and pilots gradually getting less flogged in the months to come, this would appear to be the case for all the airlines at present but certainly QF and QQ.
Against this is probably the most volatile pilot market in many decades in Oz with opportunities aplenty for movement for those inclined - but that will change only because it always does, when it will change the big question.
Like it or not QF is the only local prospect who arguably will never go broke or fail as well as the only airline offering "traditional" progress through seniority on types/divisions which is probably attractive to many.
Others more versed in money matters can comment but rumours Bain have already get their money back from VA by loading debt against VA and Bain pocketing the cash, whilst unlikely they could decide tomorrow to close it down/sell up any assets and piss off, they do NOT want to run an airline they care only about $$$ and can be ruthless in how to obtain it (IMHO of course!).
Point being that arguably all the other airlines have the potential to go down (for different reasons and with different degrees of threat), if you factor that and assume jet time will get you another job somewhere (if required) then where you want to live becomes primary consideration, who can provide that opportunity secondary.
Best of luck choosing wisely with the unprecedented current pilot market and opportunities in Oz.
Cheers.