Most beef is good, show me a breed that has bad beef! (Maybe somebody knows?)
I've always suspected that some big breeds like Charolais known for their lean beef might not taste as good as some of the well-marbled breeds. But I've never had the chance to knowingly sample Charolais, or anything other than Holstein and of course the CAB.
I've been told that Scottish Highland is one of the yummiest beef out there. Again, like the Jersey, you have a smaller animal that won't normally weigh out over around 1,000 lbs.
I raised a few Holstein steers up but sold them before they got to market weight, because of personal reasons.
If I had the money to burn, my top choices for beef breeds (for personal use or local marketing, not national) would be Highland for northern climes (with possible crossing), and I'm not sure for southern climes, but maybe crossing longhorn with something meatier. For dairy, I believe I would look hard at Brown Swiss, and also raise up the steers for meat.
But I'm just armchairing here!