Not sure I'm the expert on this, but I'll try to help.
I use three airbrushes - the first is an old Paasche Model H single action, external mix, siphon feed brush. (Single action means the trigger just releases air, the paint flow is adjusted by manually setting the nozzle; external mix means the paint and air mix together outside the airbrush; and siphon feed means that the paint reservoir is below the brush and the paint gets "sucked up"
. I use this for primer and broad coverage of paint, although with its three different needles you can get fine lines. I use it for about 90% of my work. It's incredibly easy to clean.
Next I have a Paasche Talon, which is a double action, internal mix siphon feed brush. Double action means the trigger controls airflow (by pressing down) and paint flow (by pulling back) and internal mix means the paint atomization occurs inside the airbrush. It's a good brush for fine detail and broad coverage.
Lastly, I have a Harder & Steenbeck Infinity Two in One double action, internal mix, gravity feed airbrush. Gravity feed means the paint cup is above the airbrush and flows due to gravity. I use this for extremely fine detail, as I have a very small needle in it.
I'm in the USA, and I buy all my airbrush supplies from spraygunner.com. Really helpful folks - I see you're in OZ, so I can't help you there.
I've tried other airbrushes owned by my modelling mates, like Badger, Aztec, Iwata, Grex, etc. Of those, I liked Iwata best. My OPINION, however, is that Harder & Steenbeck are the absolute top of the line for quality and the precision of components. They are also one of the most expensive. My Talon is a good middle-of-the-road airbrush, and my Model H is my workhorse. This may sound odd, but you don't need the most expensive airbrush to do good work. You just need to know how to use what you have. There is also a bit of artistry involved.
My advice is to seek out fellow modellers (are you in a club?) and see if you can try out different airbrushes. There is nothing better than getting your hands on an actual airbrush and putting it through its paces. If you can't do that, sometimes the airbrush companies give demonstrations at modelling shows, etc. Alternately, this site...
...has a lot of good information, and the guy writing the reviews knows what he's talking about. Good luck in your search, and happy modelling!
PS. There are a lot of airbrush "clones" from China on eBay, etc. that sell for incredibly cheap prices. Some of these are quite good, and others quite bad. There seems to be little consistency, and you don't know what you have until you get it. Buyer beware as they say.
14. August at 17:43:30