Angus is quite overrated. Its flavor can be very good but it is hardly the be-all end-all of tasty beef product. 'Certified' Angus Beef means that its within the top third of the Choice grade stratum, or better, though if it is considered Prime, believe me, it will be labeled Prime. I don't find it worth a premium over similarly marbled non-certified beef but it can be worth a small premium (or more, your choice) if larger cuts (like brisket or other roasts) are being purchased as these items can be very hard to assess visually for marbling.
Certified Hereford Beef is, like CAB, a marketing thing. CHB cannot, however, be assumed to be in the top third of Choice. It might be Choice or Select (it should be labeled whatever it is). Hereford is a delicious beef. It definitely rivals Angus for flavor and I know many people who prefer it. Of course, what something is 'worth' depends on what someone is willing to pay. Since you weren't willing to pay the $170 it wasn't 'worth' that. But, to be less vague: Would you have found the meat to equal your likely expectations based on that price? I highly doubt it--even if it was Prime. Prime Hereford is really delicious but I scarcely think you'd have found $170 fair no matter how much you enjoyed it. I know I wouldn't.