I haven’t used Iron will but the materials and craftsmanship look amazing. I have used Ethics for .166. They are made well but i found that to get the right weight i had to use aluminum footers, which is not ideal. They have a stainless option but then it’s makes the weight up front too heavy. It is quality and made well. My dad has used the VPA and they are okay, cheaper for sure. They were light which is good for adding protection but not weight. Again I think they were aluminum. Whatever footer/collar you use I recommend against aluminum as they can bend. Podium archery sells a collar as well that is titanium. I would choose iron will if I could afford it.