Best is always subjective - most rugged, most precisely adjustable, lightest, etc.

The Williams FP is a proven commodity and has the best adjustments of any that I know of. Windage and elevation click adjustments are very precise and allow very gradual adjustment of POI compared to some others that just have you slide things around.

Lymans and Redfields are also click adjustable but current Lymans are made of plastic and the great Redfield sights are long out of production. I love those Redfields and have been known to buy a rifle of lesser condition than another off of gunbroker because the former came with a Redfield peep sight.

If you want a solid steel sight the Skinner is another option and uses the pre-drilled scope mounting holes in the AE receiver but windage is a "by guess and by golly" affair like the XS sights. He also offers replacement patridge style front sights if you like those.

http://www.skinnersights.com/winchester_26.html


FWIW, if you have a dial caliper and know the formula for adjusting sights you can make those sliding adjustments fairly accurately. Or if they rely on loosening and tightening opposing set screws then if you know the thread pitch that tells you how far it moves per turn and that can let you make fairly precise adjustments as well.

(POI Change needed at target / Distance to target) = (sight change needed / sight radius). All measurements are in inches. You know the POI change needed, you know the distance to target and you know your sight radius. With those three you can solve for the sight change needed.

Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!