I’ve used lugs from Tannel and Holland and have had good results with both. I’m always intrigued with the “why bother” attitude that is associated with many of these rebarrel questions. To me, if you’re going to spend the time and money on a rebarrel, why not spend the little extra on a lug, on ensuring that the relevant receiver surfaces are true, etc. Can I prove that any of this will make a rifle shoot better? No, but it seems like reasonable insurance in this contex. Just my view as someone who has been a custom rifle client and has built a few of my own.