Shilen, Muller. Lilja and benchmark are currently the top remfire barrel makers. "Not necessarily in that order." And I would never stray far from those four. The Muller MI has the upper hand right now but I would never say one is better than the other. Once you buy a barrel blank it's out of the makers hands! I would be more concerned about the gunsmiths ability to chamber correctly and slug the barrel to determine where to place the crown.
You forgot Bartlein and Krieger and I've tested ALL of them on a RimX. Krieger and Bartlein were top of the list performance wise from 50-400... with Benchmark being a close 3rd...