I can't recall offhand the name of the manufacturer or model, but there is an airbrush that you can buy that makes you God.
Using the latest technology, it senses the viscosity of the paint and analyzes the shade of the paint to make recommendations on the mix. MikeV will know more about it than I. (I believe he is still using a traditional airbrush, and not the be-all-end-all of airbrushes)
The same company also sells a compressor that uses "smart technology" and actually shuts itself down when someone completely unskilled tries to use it. There is a feature that will melt your model if you try to bypass this function, so be warned.
If you talk nice to it, though, you WILL be a better modeler. Oh, use a moisture trap.