Scope shooting may also depend on what type of target shooting you are doing. Many archers prefer a smaller scope diameter for indoor spots, and a slightly larger scope for outdoor/3D for its light gathering ability.

Also look at your peep size. Clarity of the scope is a very individual thing- what may be crystal clear for me may be a bit fuzzy to you, especially at the higher powers. You may have to play with sight bar extension length for clarity as well. But the farther out you go, the more "shakiness" you will see in your sight picture.

Also consider how well the scope diameter size fits in your peep hole size while eyeing up the target.