I know the subject has been beat to death on this site and i have read most of the posts, but i still cant decide between 65mm vs 80mm STS non-HD. The scope will be used while back packing almost exclusively but i am willing to pack the extra 1.29" and 7.13oz if it is worth it. In low light at dawn or dusk, at long range, 3/4 - 2 miles, and at 50-60 power, will the 80mm let you see buck horns any better? thanks for the input.