Here's the skinny. You have roughly $2000 to spend. Your ONLY choices are an M1A or an AR-10(or AR-10 variant), brand or other specs are up to you. Specific criteria is to build the most accurate rifle @ 200 yards. Most shooting will be done from a bench position but I would prefer not to have a rifle that is to heavy to reliably shoot from the standing position. Scope is fine, ACOG would be great but unrealistic in that price range. What do you choose and why?