Show hfrs are definitely a possiblity out of brilliance and some of the other Angus bulls. Steers may lack the power to compete at high levels but can be ok too
I would use a red Angus or angus bull first go round. Detour has been a great red Angus option for me. Brilliance is a fancy black Angus that's hfr safe. Good luck
You are correct. It's a craps shoot. You can get lousy cows out of purebreds also. I say if shes feminine in her makeup and design, and you like her, give it a go. Cull her or she doesn't meet your expectations after her first calf.