kwblake,
you're correct in assuming that I already have a largish compressor. In fact, I was thinking about getting a spare tank, use the compressor to fill it (say at 90 psi) and use the tank, with a regulator, to run the airbrush. How big of a tank should I get? As for the price range, around $60. Should I go with a dual action? Is there any use for it?

Thank you
Ululi