My preference is for the heavy duty duplex. I also like an illuminated cross hair just at the center for leopard hunting. I would design a scope with a long eye relief and mount the scope in a forward (ahead of the chamber) position. This "scout position" prevents scope cuts, allows a more "both eyes open" sighting picture, and because they are typically of lower power have a greater field of vision: helpful when hunting dangerous game. There are very few scopes manufactured this way. I for one would welcome more selection. If a Zeiss or Swarovoski scope would allow for more eye relief, they would be my favorites. Leopold quit manufacturing the LPS 1.5X6X42 recently and broke my heart. This, I feel is an excelant big bore rifle scope. What is the neccessity of mounting a scope so close to your eye when you chamber a shell in the old .416 Rigby. Sounds pretty crazy to me.
WR