I have moved this to the 'tools and tips' thread as I think it will be more usefull here
Ok where to begin, Firstly it comes down to cost. How much do you want to spend? then what would you be using it for and have you used one in the past.
I would recomend getting a good compressor as this will probably last you the length of your hobby. These start at about £50
The airbrushes I would go for if you are a beginner is either a badger double action or a Testors aztec. these are around £30-40
But then there is all the gubbins like hoses and regulators.
Here is a good deal from everything airbrush
http://www.everythingairbrush.com/acata ... lbiss.html It contains a nice gravity feed, double action airbrush, compressor, braided hose, reulator and stand. These are also in our 'traders of merrit' thread in the modeling comunity area
Then all you have to choose is what paints you are going to use, I personaly use Vallejo model air as they dont need thinning in order to spray them.
You can then buy aother airbrushes as and when you are ready.
hope that helps