Vortec?

I have a black shorthorn plus that I am considering breeding to vortec. She is half angus and half shorthorn. She has already had one calf and is has plenty of volume so calving ease shouldnt be a big deal, but unless im mistaken vortec is calving ease anyways. Ive also though about Sinister. Ive bred her once to sin city but she didnt stick, I was really wanting a blue roan. But I have Vortec and Sinister in my tank. Any thoughts or suggestions?

I really like Vortec cattle. He is not a calving ease bull. I'm not saying he is a cow killer, just saying wouldn't use on virgin heifers. Make sure your cow is correct on her front feet. I don't know much about Sinister except , I like the way he looks & the way he is bred.