I have a small comp from Harbor freight. It works pretty good for air brushes. I picked it up on sale for $50.00. I was tired of using my 60 gallon 5hp monster to run my sir brushes. It would not cycle much, but every time that monster started, I jumped and messed up the paint job.
I have (4) of the older single action Paasche air brushes, an Aztec, (1) Paasche dual action air brush, a couple of the HF ones, then I bought the set. I was walking through the store and saw the small set for $5.00, had to get it.
http://www.amazon.com/Paasche-H-SET...d=1389238723&sr=8-2&keywords=paasche+airbrush
http://www.amazon.com/Paasche-TG-3F...d=1389238723&sr=8-4&keywords=paasche+airbrush
http://www.harborfreight.com/deluxe-airbrush-kit-69492.html
http://www.harborfreight.com/professional-6-color-airbrush-kit-with-holder-95923.html
http://www.harborfreight.com/quick-change-airbrush-kit-93506.html
Each has its best uses. The single action is good to about 1/16th or 3/32 inch lines with thinned paint and low air pressure. It can do a lot of area with higher pressures. The $5.00 set works pretty good for area coverage, it is not a fine detail air brush. Yet it is easy to use, clean and get ready again. The dual action brushes can do 1/32 inch lines with ease. Thin paint, low air and my hardest part, no shaking of your hand. They do take a little more to clean up after you are done. The Paasche dual action is for very thin paints or even inks. It was great when I was weathering stuff. Very fine details, yet it is not good to cover a large area. The set is nice when you have a bunch of different colors and you want to swap between them with out having to clean the gun. So, you might want to get a couple of them.
This is the compressor I use now. It is not silent, but not real bad. This is coming from working in construction for a long long time, so sound levels are relative.
http://www.harborfreight.com/13-horsepower-3-gal-100-psi-oilless-air-compressor-69269.html
You will also need a better regulator then the one on the compressor. Plus you need a good water filter and descant water filter. I might be just lucky, but the 3 of these I have, have worked real well.
http://www.harborfreight.com/inline-desiccant-dryerfilter-68215.html
I plug the air brush into this one, it is better to have it close to the end.
I run the line from the compressor to this regulator, then to the descant filter, then to the airbrush. I have quick change fitting on everything.
http://www.harborfreight.com/38-in-air-filter-with-regulator-68232.html
Water is your enemy, practice is your friend. When in doubt, thin the paint more.
Buzz.