Planning a Trip

I am looking at planning my first 4wd trip about this May/June There will be two of us travelling. I will be leaving from Melbourne and driving to Alice Springs. The plan is to go via the Flinders Ranges, Coober Pedy, and Ayres Rock. The return trip will be similar but travel will be via Oodnadatta.

My first and main question is about the car. If anyone has a recommendation of a good Hire place in Melbourne I am listening. My other option is to purchase a vehicle for use on this trip and possible future use or simply to buy a car for this trip and sell it once I am done.

I am wondering if I was to purchase a Subaru Outback or Forester would these cars be ale to handle a trip like what i suggested above. I know that they would not be able to travel to areas that a more capable 4WD car like the Landcruser or Patrol can. I also know that there are more spare parts available in remote areas for more popular cars such as Toyota, Nissan and Land Rover.

Once I have either found a hire place or decided what car to purchase the real planning can begin.
Thanks in advance for any advice