I chose a Nightforce ATACR F1 4-16x42. Plenty of magnification for the 100 to 150 yards I usually target shoot at, and parallax to 45 yards (below which I never shoot with my Impact .30). It's compact at 12.6 inches and a little heavy due to the fantastic 34mm construction, features, and glass. I'm using a 20 MOA Unimount so can have huge elevation travel. Got mine through NF military sales, but still over 2K. This scope solves any quest for improvement.