for your price range you can get a SB600 or maybe even a SB800 (one of my favorites) for a couple bucks more - used that is.
just having a similar discussion w/ another forum member in this part of the forum. Take a look at it - he was looking for an inexpensive flash and i think most of the recommendations and feedback could apply to you.
With your D3000, you could also try off camera flash w/ a cord! that would get it off axis and avoid firing into your newborn's face. Give you a lot of flexibility while still allowing you to use the less expensive 400 or 600!