RE: Broadheads that fly like field points.
I don't recommend that at all. Mechanicals and that is what I assume your asking for are not excuse to not keeping your bow tuned. Making a shortcut of a mechanical isn't utilizing the mechanicals to their potential and perhaps could even hamper penetration etc....
All broadheads, perhaps all will fly like field points. I'm currently getting field points, Muzzy's and RM Snypers to fly pefect. First and foremost, tune your bow or your going to have problems.