alot of people recommend Megasquirt, very user freindly, relitvley cheap and simple to get running and tune with a laptop.

You can get a kit which you put together or buy it already put together. you can get them off ebay not sure if anyone in Austrailia sells them? just do a google search.

I have used Autronic in the past with great sucess, their systems are also very relible and user friendly but a little costly.

It all come down to your price range, what EFI system are you going to use? EFI harware? custom?