If you're going to start a family, remember that those kids are human beings - they are your responsibility but not your property.
Choose the breed of your puppy, or choose the color of your car. But leave the gender of your child up to the chromosomes. Accept and respect your kids as they are.
I think that this sort of genetic manipulation should not be allowed. We rely on nature to ensure a healthy distribution of males and females on this planet for population stability. Allowing parents to choose their child's gender would lead to some serious imbalances that could threaten global productivity and many other things.
It should be legal for parents to choose the sex of their child, if they are in a position to do so. I think that this would only be abused in situations where other laws are in effect that cause parents to select for a particular sex because of traditional roles and expectations of the child. When China put a limit on family size in a cultural tradition that favored male children, the women would seek to abort a female child. If parents are free to just choose a sex without societal pressure, it seems to me it would work fine. Families who have all boys may want a daughter, and vice versa. What would be wrong with that?
It should not be illegal for parents to choose the sex of their child. If all it is, is a selection process, and an embryo isn't hurt, then it should be perfectly legal. If there is pain or too much manipulation involved, then no. From my research it seems that the latter would not be the case. Allowing parents to choose the sex of their child might make them more involved as parents as well.
It should not be illegal for parents to choose the sex of their child. This is because of the fact that the parents are the "owners" of the child, and they are free to do with the child what they wish unless this involves abuse. As it isn't inherently wrong to be male or female, it should be their choice.