I am a big proponent of running caged ceramic thrust assemblies. They don't really wear out, and run a lot smoother. I personally run the avids
The only thing to watch out for, is sometimes they have an overall thickness that is thinner than the stock thrust, which means the bolt will bottom out in the screw before your diff is tight. Simply put a washer on the bolt head to achieve the same overall thickness. Usually not more than .5 mm or 1.0mm.