Comp's XE Cams

Just a question as I don't have any personal experience with these cams. Is it true that the xe cams are hard on the valve train because of their aggressive ramps? Also I read / heard that the rocker arms are usually noisy. Again, I'm only asking a question here. What brand cams still have good quality? Lunati, Howard's? I thought that I read that comp was having trouble with the lobes wiping out easily but I don't know this for a fact.