As a life and leadership coach who specializes in decision-making (including reproductive), I always say "One choice or the other will not make you happy. Happiness is a choice."
Matt made this point:
My kids don't make my happiness. That isn't their job. My happiness isn't a responsibility that falls on their tiny little shoulders. Kids come into this world helpless, naked and needing, yet so many of us immediately shove them into the Happiness Factory and bark commands. "Get on the assembly line and build me some happiness! Quick! Do your duty, sir!" This is precisely why many mommies and daddies are NOT very happy people. Many are lost, confused and disappointed. They are anything but happy because they were fooled into thinking that they didn't conceive a human -- they conceived a little happiness generator. They were fooled, in many instances, by parents who know better.
Yeah, you have heard those parents. I call them the parenthood lobbyists. They say "it's the best thing..." or "You are missing out..." but they are only telling part of the story. The trick is to tune the lobbyists out and focus on what you really want and what your partner really wants. Then, whatever you choose, whatever the outcome, you can still choose to be happy.