For Inverters, I would go with SolarEdge. Being optimised, each panel performs on its own merits and you get panel level monitoring. With a Fronius string inverter, each panel in a string works only as well as the worst performing. SolarEdge Inverter warranty –-12 years, optimisers 25 years. Both parts & labour. Fronious 5 years (P&L) - plus another five (parts only if you register on line). The panels you are looking at are good but, in my opinion, overpriced. I would go for panels like Longi, Canadian, Jinko, JA, Risen or Trina. They are all according to my research, good panels, well supported in Aus and financially strong.
If you want to keep it simple and just choose one of the three options, I think option one is the way to go.