I do not own nor have I ever fired a PAC-NOR barrel but I have done a fair ammount of research on barrels and what other people like. I will someday build a custom rifle
in .280 Ackley improved and it will have a PAC-NOR barrel. The people that do own and shoot them seem to think they are the bees knees and often at a very reasonable price.
There is no "best" brand but there are a number of great brands and from what I have found PAC-NOR is right in with the top makers.