Couple of questions...
Are you looking for a compressor just to airbrush? Or would you like to get one that can do other things? Do you already have an airbrush? How much painting are you anticipating?
That setup doesn't seem too bad. It's strictly airbrush, though. And the airbrushes they show are simple single action brushes. Those are good for some general work, but a dual action gives you more control.
I run a Campbell-Hausfield 5 gallon compressor with a Paasche VL dual action airbrush. Plus I get to use the compressor to blow off my dirty cars and have a few tools to work around the house with. So it serves a lot of purposes. I paid like $250 for it..