I am new to this forum, and new to long range hunting. Right now I am working with a Savage .308 that is showing 1/2 minute potential out to 4 or 5 hundred yards (500 is the longest range I have access to) My old Winchester spotting scope becomes useless at about 300 or so because the glass just is not very clear. I am looking at a Celestron Ultima 80 or possibly Ultima 100. Is the extra $$$ for ED glass generally worth it? How much difference does it make in any brand? I would like not to spend more than 3-400 on a spotting scope right now, If ED glass is not worth the extra then is the Celestron Ultima 80 @ $178 on optics planet a good choice? Thanks for the help!