Right now, I have a Leupold mark 4, 6.5-20 on a 338 edge. i would like to move up in power some. i would love a NF, but to be honest i don't think it is in the cards money wise, seems like i would have to sell my scope and then still add quite a bit of money to buy one. or, what can i get for my scope, and what can i find a NF for? with that being said, how does a Sightron sIII compare to a leupold mark 4 as far as quality and glass ? any other scopes i should check out? thanks in advance.