Factor in another lower for 200-500 and you got your complete rifle. I feel companies will always be able to make and market rifles much cheaper then one ever could think of putting it together themselves, especially if its an apples to apples comparison. I think the benefit in DIY, is being able to spec build to your hearts desire. Picking out my favorite parts and wrenching 'em together is probably why I'll choose to build mine over than buying a factory one. That and I get a sense of satisfying my need to tinker. There's some nice bang for your buck barrels out there. White Oak Armament has a rifle 18" that has a good track record. Out of my personal observations, BCM SS410 and Rainer Match barrels have had good results. I think some companies offer a accuracy guarantee on their barrels.