I have set my sights on a new spotting scope as I have sold my B&L Elite 15-45X60. I will be getting a Swarovski. My question is this is the 20-60X65 mm all I will ever need?? I have a line on a 20-60x65 mm HD and an 20-60x80mm also that are good buys. Are the HD and the 80mm worth the extra money?? You can only tell so much inside a store. Any info would be appreciated. It will be used primarliy for deer but I also hunt Antelope and Sheep when drawn.