Go with the ground recoil lug and precision barrel nut that Jim Briggs at Northland Shooting Supply carries. Great quality and will definitely help you keep everything stout and straight.

I cannot say I have ever seen a factory lug bend from use, but the factory lugs are stamped when they are made and as such are often warped and don't make good even contact with the stock. Replacing it with a good ground lug and a trued and squared barrel nut help keep the barrel straight against the action and the barreled action straight in the stock.