CTiger... options are always a good thing, but simplicity is much more important... consider the fact that a "designated marksman" may be shooting from a shot distance to the max distances...and not at a paper target, often your scope is your long eyes, if your without a spotter, for target acquisition, and clairification...and the target itself, may be moving, or offering a small profile. One of the best, of the best...of all time GY. SGT. Carl N. Hathcock II...used a Leupold fixed 10X Ultra, that had its zero at 700 yards, keep in mind, he knew his weapon, knew the art of wind, and hold off, excuse me, knew is the wrong word... "lived with, and breathed", would be better... keep it simple, know your ammo and weapon, and go high in the X departments....8X, or 10X, fixed, outside adjustments.... and then practice, figure, in war, hitting anywhere between the nose and the belt buckle, is a hit, (36" X ring) only paper requires... key holeing. figure out the music you plan on dancing too...and then choose your optics...and equipment. Arc-Lite