Thanks for the replies fellas.. solar is definitely the way to go right now,. We have a further 21% increase coming in QLD which would take our quarterly bill up to the $750 mark which is just ridiculous. I can get a 5KW system ( each KW should produce around 4 -5KWh) on a north facing roof for around $800 a quarter interest free over 24 months and that's not taking in the 18c rebate.
Glad to hear no one has had any problems with the systems. Each time I talk to a solar company they start out by telling what I should steer clear of.. this panel.. that inverter... this company etc... all very negative selling rather than positive. My thoughts have always been that if you have to make yourself look good by bagging someone elses then your product just doesn't hold up.
A bit more research on my part and it seems that the Aurora inverter is very well recommended.. if I can get my Chinese Growatt swapped for a Chinese Aurora then ill feel much better.

Thanks guys.. much appreciated!