I do a lot of deer hunting late in the afternoon and its legal to shoot in NC until a half hour after sunset. I currently have a bushnell sportview 4-12x40 on a savage 270. Its always a struggle to see the deer in the scope during the last few minutes of shooting light and I am considering upgrading to possibly a leupold VX II on a new rifle. My question is will I see enough of an improvement to justify purchasing a more expensive scope?