[Nursie]

Make sure your employer is willing to sponsor you on the other side. I worked for a large multinational in London that were not.

OTOH the independent visa gets you much better terms than the sponsored one. The sponsored one contains a provision stating you must leave the country if you're unemployed for a month (IIRC). BUT you will need to prove more experience than you currently have to get the independent PR visa. If you have the BSc it knocks a few years off the experience requirements.

I found the australian immigration website and a web community called PomsInOz very helpful for these things.