Its usually the weight hunters are going for, try the EL in 10X42, unless your bird watching from the truck. But they are the best, I have the EL10X42 and love them
My hunting buddies drual over them comprared to there Leupolds
I personally would not go with a 50mm objective lense unless you plan on bringing a tri-pod with you or are using them for marine puposes on a ship. For binos that will be used and carried for hunting I would not go with anything larger than 40mm in my opinion. 30mm would be more like it for hunting. True that you will lose a bit of light gathering capability with 30mm, but in a high quality brand like Swarovski a 30mm OJ should still give you way more brightness than you will ever need for hunting in the darkest overcast, even at dusk and dawn. For spot and stalk hunting you sure are going to have a sore neck and sore upper back luging around large 50mm binos all day. 30mm to 40mm binos are more reasonable and manageable.
Out here in Colorado, and in the units that I haunt, it is a tricky game to figure out how far to pack in on a rifle hunt. You want to get away from the masses that have moved game away from the roads but might want to stay close enough that you are taking advantage of the animals forced movements. There is no universal distance but I like the 1.5 to 4 mile range for day hunts where I am not planning on bivying out. This keeps you in that productive buffer zone where the animals are really...