I've only seen Doctor Who's (and the bull himself in Denver and as a mature bull), and Red Hot's in person, and they were impressive. I have used Doctor Who, he excels in both steer, heifer and bull production, and depending on the cow some of his calves can be high maines.. I haven't seen to many out of either of these bulls that I didn't like. Birthweights worry me on Red Hot, I've heard horror stories, the same with Salute. Gold Digger's 1st calves should just be hitting the ground I think. Hired Hand's structural soundness really bothers me, looks like is front end will give out at any moment. If I had more cows I would try Red Hot some, but right now I don't have enough cows to try every bull out there that interests me.