Agree that quality in coaster brakes does not have a huge range. Fairly simple bomb-proof mechanics. Though I have seen the results of a coaster brake completely failing when used in demanding situations. My favorite I've ever torn apart was an old Perry. I would trust those sturmey archers though. Those look awesome. What I wanted to say is the harder part for me was always finding a coaster hub that was laced to a decent rim. For my own builds I would start with a any old decent coaster hub I could source, but spend my money on a quality allow rim and good spokes.