In addition, it will also depend on how often you think you're going to do this. If you're only going to spray your own stuff once, just about anything that works will do. If you think you'll want to keep doing your own spray (assuming the enviro nazis don't get hobbyists banned from buying material), spend the money for hvlp. Anyone who's used a siphon feed gun has swept up a LOT of paint overspray from the floor, not so with an hvlp. They pay for themselves over time by comparison.