I have a few questions about binoculars before I purchase a pair. First of all I hunt any species i can get a tag for so theses binoculars will be used for upland game, waterfowl, big game, and predator hunting. These binoculars must be versatile and durable. What zoom should I get? What brand? How much should I plan on spending? Whats the best bang for your buck? Where should I make the purchase? (I'm in San Diego) whats worked best for you?