My opinion, a well finished beef of any breed should be good. We have had Angus and Hereford both processed and no discernible difference as far as marbling or flavor. Honestly I would rather sell our black hided calves and keep back a Hereford to process because the black calves sell better, and we would just as soon finish out a Hereford as anything else.
I've heard a lot of people that like Jersey beef and a few that were turned off by the yellow fat. Thanks to a neighbors Jersey bull, we have a Jersey Angus cross heifer, I am hoping that she will calve out ok and if she does I am thinking that calf would make a good beef.