@sal19515 I am also a ME and migrated here in Perth WA since October 2016. In my opinion, it depends on your preference, family status and job opportunities. Here are my say as follows:
Go to Sydney or Melbourne if you prefer a fast paced metro lifestyle as it is an old city with huge population. Work is there in the construction sector, buildings and design. You can also have a better go for better manufacturing companies there.
Go to Brisbane if you look for a trade in mechanical fitting and even manufacturing. Just make sure you invest in trade tickets, licenses and certificates in forklift, etc.
Go to WA if you wanted to pursue mining jobs and FIFO work. Northern Territory in Darwin applies except its regional area.
I seldom heard Southern Australia a good pick state for ME as Adelaide focus on medical field opportunities.
Just ask me further should you wanted more info.