Depends if you're getting one for looks, or functionality. The big loop levers bring back memories of John Wayne or The Rifleman, but in reality, I've never cocked my lever actions by swinging them around by the lever. In .357, I think either barrel length is fine, the 16" is lighter and more compact to carry, and the 20" has a longer sighting radius for using iron sights, which might make it easier to hit with at longer ranges. I've never shot a pistol calibre rifle at over 100 yards anyway, myself.