a good gun...

looking for a good spray gun for larger areas, like doing whole sides of boards, or larger areas. i have a few touch-up guns, and a regular siphon feed cheap gun. i’m looking for a gravity feed gun that will minimize paint and not blotch. i have a hvlp gravity feed gun i bought on sale, but it spits alot, and its leaking soem sort of oil or soemthing. i gotta clean it.