RE: broadheads ?????
Muzzy 100g 3-blade here. I switched to these after using Thunderheads for a little while. I never liked how the Thunderheads had to be screwed onto the arrow in order for the blades to stay on. I like how the Muzzy blades interlock and then are held together via the screw-on tips. Never felt a need to change from the Muzzy's.
I did try some NAP spitfire mechanical heads once but I absolutely hated them. I've essentially sworn off mechanical heads.