I was trying to decide between the ACR and a LaRue a while back. I have wanted the ACR since it was the Masada.

I ended up getting a LaRue Stealth because I found a sweet deal on one. I can tell you that it performs exactly like they advertise, from a bipod at 100 yards all shots in a group the size of quarter, as far as reliability I have 500 rounds through mine and no complaints. I have no regrets, well one I might have bought the OBR instead but they weren't available then.

I held off on the ACR for three reasons; 1. the price reflects the R&D of getting the platform to market more than it does the finished product (JMHO), 2. it may take a few generations to get the bugs out (recalled in 2010, full auto when you are not trying to go full auto is not a good thing ), and 3. limited market parts and no aftermarket parts.

Hope that helps