I've found that a good regulator is more important than the compressor itself. As long as the compressor puts out 30 psi you're good to go (At least for my Badger 100G). It's important to have a regulator that has a fine enough control range for different types of paint. BTW I just bought a used oil-less tank type compressor for 30 bucks at our local pawn shop and it works great, even has a good built-in regulator so it's like getting a two fer!
Pat.