Welcome to the forum Ken, and on what you have put forward in this thread and your one under Education, I'll not go into great detail but if it were me I would be getting the immigration in hand first for whereas you say that you qualify for
PR straight away, it does not happen quite that quick and more in the order it would seem of twelve months or so at the moment from date of application being received.
A precursor is having your qualifications approved if that has not already occurred, and if need be add on a few months more.
As to work opportunities, whereas some organisations may hold an MBA in high regard, I would suspect that with job applicants it may come down to a discerning factor more so than a primary one and you could even find that all else on an equal footing, experience in the Australian workforce environment in more youthful years would be considered more an advantage.
The other global overiding factor is where is the economy heading, for whereas IT/Communications in Australia has been as great a growth industry in the past decade or so as it has been globally, recession/depression can have a dramatic effect on any industry and Australia will not be immune from what happens globally.
In that environment, some people start to consider their optional expenditures, IT/communication expenses being one for individuals and recruitment being one for companies and in the reversal of that there is very often the first on first off rule applied, not to mention that middle management levels can also often be the first considered to be superfluous to an organisations needs in times of tightening the belt.
So whereas global/Australian economic trends will emerge in coming weeks/months, I am not about to be making any predictions and I have a vague recollection of it possibly being our chief telco, Telstra that a few weeks back did announce some cutback program - could be something around on google about it, and that'll certainly be one way of making assessments - go and see what the major players are doing or have in mind, Telstra, Optus, Vodafone being the three mobile communication networks whilst Telstra are the landline network owner (though Optus are running out some of their own cable? - sorry not up with latest on that) and then a host of secondary companies, Orange, Virgin to mention a couple of service providers and there are also service providing companies to the networks.
But you will likely be able to make better decisions by researching the industry in a bit of detail and seeing what organisations may be of interest to you and in deed what organisations could have an interest in you.
Good Luck.