I have some nice calves out of Escalade and commercial Angus cows this year - replacement females + one steer that is real nice and will probably run Angus down here. Pretty good option if you wanted a chance to go both ways.
I've never been able to get a good steer in years of trying using Charolais bulls on Angus cows. I've tried it every which way imaginable. Ought to work, but doesn't.
Walks Alone will work on Angus cows. Monopoly will too if you want steers that will run Angus. Plus, Monopoly females bred that way are real nice.
If you are primarily interested in heifers, hard to beat Sim-Angus. A million ways to go, but if you want ones that will raise steers for Texas then follow the guys that are best at it and use something Meyer, Steel Force, or Chopper. Commercial or registered Simmental ain't the same thing as clubby-oriented Simmis.