If you don't mind considering going in a bit of a different direction, consider a grex tritium.
I have a tritium with a .2 and .3 needle setup with fan spray attachment and small med and large paint cup.
This setup ran about $260 but I am able to use this AB as a fine detail airbrush all the way up to a mini spray gun with the fan attachment.
Since I can change cup sizes I can go from spraying a few drops of paint all the way to 3oz of paint.
The atomization is like fine vapor mist. When the paint is thinned right I get great wet coats that are thin but keep a wet edge. I can get the lines down to pencil thin with the .2 needle. Not as fine as say an iwata micon but close.