I ran a couple MK 4's the glass is good, but when you engage the turrets they are not nearly as "crisp" and clean as the NXS's. NF has some good glass as well, but IMHO I would take a hard look @ the NightForce the repeatability and the click value is better than Leupold...
ALSO, if I were you (depending on how far you are shooting) I would look into the standard turrets not the custom, as your variables and conditions are always changing, why pay for the custom cut turrets when you can dial the minutes or mils just as easy!!!
