Well, here in California black steers are the most competitive. My sisters and I always get Maine Anjou cross steers for jackpotting and for our county fair and we do very well! A lot of people that I show with are showing steers that are either Maine Anjou, black Angus, or Semmental cross steers. Lots of breeders who raise good quality show steers are breeding to composite bulls that are going to throw calves with lots of bone, rib, depth, muscle...ect...and hair (which you can get a lot of from Maine cattle). Some composite bulls that are pretty popular right now are ones like..."Who Made Who", "Heat Seeker", "Witch Doctor". There are tons of nice bulls that are used for club calves. Also, Short Horn corss steers are doing pretty good.
We jackpot and raise black Angus heifers. We don't have any cross bred heifers, but from watching at the shows the Semmental Angus Maine cross heifers are doing good! I dunno...there are lots of things that I can tell you...I guess it just depends on how competitive you want your calves to be. But, I can tell you from experience that black is the most competitive in the show ring. Good luck! I hope that some of this helps.