I am looking to purchase an ACR in 2010 when they become available. I want to buy the .308 rem model with 20" barrel. I am a soldier in the US Army and need a capable weapon for tactical purposes (practice makes perfect) and efficient at dropping game. I can get a module set to convert it to the .223 / 5.56 round as well for alot less then a second rifle. What scope would be recommended for the .308 REM? I would use an ACOG for the 5.56 but that wouldn't give me the long range that I want for the other. I want to be able to utilize the maximum range. Something with a range finder built in would be nice. I am a proficient shooter to 300 yards but I know a .308 REM can reach out further. I'm just not sure how far. I am not familiar with this round. Any help would be greatly appreciated. Thanks. I am curious to hear opinions on this weapon and/or round I've chosen as well as ideas on a scope.