A classic sears air compressor, belt driven piston design with a in line air dryer plus two other inline desiccant filters. 2 viper gravity feed guns with a 1.7 tip for primer and a 1.2 tip for paint and clear.
It really doesn't matter what you use as long as you make sure you have the air flow and dry air. Even cheap guns spray decent if you make sure you clean them really good.