Not knowing the particulars of your bow and with my very limited experience with fast bows, it sounds to me like you need a bow that will consistently group your broadheads and not sacrifice a quality broadhead like thunderhead for a mechanical broadhead that may malfunction at the worst of times. My personal opinion is keep it as simple as you can handle. I would shoot traditional if I thought I could consistently make good clean kills with it. Until then I will shoot the simplist set up I feel comfortable with. Just my .02 worth.