We are in careers like yours and Perth isn't a great place for them. Firstly, there's not too many employers to choose from, secondly, there's a downturn on, thirdly Australians aren't exactly cutting edge when it comes to modern methodologies and practices, they are getting there but work seems a bit '2001' to me, if you know what I mean.
No real problem with Perth in general but I wouldn't move here if I was career-committed. Also, we earn in excess of $200k, have no kids and, although very comfortable and happy socially etc. I wouldn't consider massively us well off. We have no savings although we do have a short mortgage. We spend up every fortnight.
Good luck.