I'm looking for suggestions on a scope for my modern hunter in 308win. I want to keep the rifle as light as possible so I can pack it around hunting. I would like the scope to go down to 3x - 4x power but go up high enough to shoot gongs at 800 meters on range days. I would like to stay around $1000 but I am willing to pay up to $2000 for the perfect scope. Thanks ahead of time for all the suggestions.