One of the more popular Fortune 500 sons was Momentum. I've seen some really nice daughters of Fortune 500 as well as Momentum. Going by the numbers, the Fortune 500s have quite a bit going for them, and structurally they were pretty good, too. If you don't care that he's heterozygous black, I think he's a smart bull to go back and use to make cows.
I liked Joker when I saw him show in Louisville. He got beat that year by a bull called Snafu who WAS A BIG SNAFU! I never liked him, and he won every show he went to that winter. It was always more than obvious that Joker would be the better breeding bull, and his daughters have proven that. I wish he had a higher API, and I'm sure it's because his marbling number is so low because marb plays into API fairly heavily. You can always go back on your Joker daughters with a better carcass bull. Or use him on Angus cows...
I'd use both of em if I had plenty of cows and wanted to make some good females.