I choose some random, uninhabited world we can terraform. Human beings have never shown the slightest tendency, as a species, to be able to coexist peacefully with our neighbors. So yeah, we can have good relations with alien species and maybe even have some of our own live there, but to dump the whole race there? Not a good idea. Personally, I'd prefer the Iskoort world. Why? Just because the buildings are so freaking awesome! But in this instance, I went with what was best for the whole species instead of me.