RE: Tru Glo or Williams?
I have a Williams Peep on one of my traditional rifles. It is a great peep sight. On the range on a bright sunny day itis hard to beat a peep sight. BUT I will be honest, peeps are not my favorite sight. They used to work fine when I hunted open field type areas, but since I moved my hunting into the woods where shadows can play havoc on shapes and outlines, I found the peep not the best choice.
Like already said, depending on where you hunt go by the size. Open field areas, then go to a smaller peep. More closed areas, the you need to get that rear sight bigger to help fight the shadows.