Homo Superior

What if you could have your daughter grow up to be the most beautiful woman in the world? What if you could guarantee that your son would become the greatest genius in the history of mankind? What if you could, through genetic engineering, give your children any trait you could imagine--perfect health, a lifespan measured in centuries, unmatched athletic, artistic, or musical talent?
Would you do it?
What if you could make your child the perfect killer--a remorseless, unstoppable, superhuman instrument of death?
Would you do it?
Would someone?