No you aren't overthinking it, most guys don't give it enough thought and just use heads, based on what their buddy uses, whats on sale, what some famous guy endorses etc.. I believe we should pick our heads based on our bow and arrow set-up and what the largest animal we are likly to get a shot at. You have it pretty easy, since you are only using one set-up and know exactly what animals you are going to shoot. Ideally your arrow would get full penetration and just fall out the farside with the biggest hole possible. If your arrow is burying itself two feet in the ground on the farside, that is just wasted energy, if it isn't giving an exit wound than it isn't giving enough penetration. ANY broadhead will fly fine, IF it is on straight AND the arrow is tuned for good flight. Yes you should be concerned with width, the wider the head, the more it cuts, BUT also the more resistance to penetration, the angle of the blades also figures in, the sharper the angle, the more resistance also. Straight edges on broadheads are the easiest to sharpen and two blades are easier than three. Snuffers are great heads, they cut a huge hole, but they also have a lot of resistance to penetration, due to; being very wide, having three blades, the blades are at a sharp angle and it is vented. Vented heads tend not to penetrate as well as nonvente ones. I personally wouldn't use the Snuffers with your setup. I have killed a lot on animals with the two and four blade Zwickey Deltas and wouldn't hesitate to recommend either one. The two blades are much easier to sharpen.