I'm chiming in a little late, but just wanted to address the question of which formula re: food allergies. All 3 of my kids were sensitive to dairy and soy as infants (terrible reflux in 2), plus food allergies in the form of one kid ana to peanuts and another with multple food issues but ana to nothing. I've done a mix of nursing and formula and one of my Dc needed one of those uber expensive hypoallergenic formulas in the end. So that's our background.
Personally, I would start with a milk based sensitive formula if I were having another baby and wasn't planning to nurse and I would bring it with me to the hospital. IMO, its easier to start with the sensitive and then, if everything seems cool, to try a regular milk brand with a slightly older baby. I wouldn't want to do soy for my infant, if I could avoid it, although my older kids drink their share of soy milk.
Ds1 (2006). Ds2 (2010). Ds3 (2012).