I'm all for genetic manipulation of offspring. Sure, there is the potential for nearsighted and inhumane abuse, and there are some benefits to genetic diversity, but on the other hand, there is a lot of potential good that could come of it. If the technology we have now was there when my brother was conceived, he wouldn't have had to suffer the pain and frustration of having his bones grow at the wrong pace and in the wrong directions (http://en.wikipedia.org/wiki/Hereditary_multiple_exostoses).
I don't believe in mandatory eugenics for whatever reason, as these things tend to go very quickly from "only people who risk giving their children horrible diseases or disorders" to "let's sterilize all Muslims because ******** 'em."
The quest to make "the perfect human being" is a disgusting idea to me. Everyone is beautiful in their own ******** way and everyone can contribute something. A society obsessed with genetic perfection will only do only harm.