I noticed the ribeyes were always good but were not marked as to grade. I once asked the butcher about that and he said it was U.S. Choice from Iowa Beef Packers. He said he had always been satisfied with their beef.
There must be a fair amount of variation among U.S. Choice because I have seen it be a little tough at some markets and other times be great.
The cattlemen at markets are really good here. I try and deal with one that I became friends with. He tells me, you ask what you want and I tell you what to buy. Fair enough. He's never been wrong.