Personally I don't like iron sights that, like the Williams, basically are held in at the foresight by a screw or screws. Much better are those held on by silver solder. I've dropped a modern Parker Hale with such a Williams screwed on sight and they do bend!
Unless the rifle is pre-drilled and tapped then having it so done may be expensive. Also getting the right sight height may be as easy as a simple boresight or it may be more complicated. It may be cheaper to get a low power, say 1x or 2x 'scope.
Some say that a peep rear rear is better, others an open mid, barrel mounted sight, is better. Again a wide "buckhorn" and a round bead are liked by some but not by others. Beads tend to shoot away from a light source. A partridge front sight, that is a vertical parallel knife blade as on a service rifle and a square cut open rear sight notch won't shoot away from a light source.