I have an Aztek 470, Badger 200 and 200G.
If you are just getting into airbrushing, don't get a straight dual action AB right off the bat, get either a single action or a variable action, that way you can practice. Straight double action for a beginner can be a bit of a challenge (at least for me it was).
Also, I have wrist problems and the push down pull back motion of double action wasn't agreeable with me after some years of owning the 470, hence why I now have the 2 badgers. So comfort and how you want to hold/use the AB might be something to think about.
As far as compressors go, get something that has a pressure regulator/moisture trap on it. Pressure adjusting is critical to getting a decent paint job, and top feed models also require less pressure to run than bottom feed airbrushes.