We used Similac and then had to switch to Similac Sensitive. It all depends on baby and what works best for them. I had some friends who had good luck with the Target brand (Up & Up I think?????)
I would use whatever brand the hosptial uses and go from there. We used Similac Advance but then switched to Fussiness and Gas with no problems. If you have to switch, I would just double check with your pediatrician prior.
Enfamil will send you a heck of a lot of free samples! I mean tubs! I prefer Gerber Soothe for my baby. This is one of the only formulas where the milk proteins are 100% broken down, making it gentler on baby's tummy.
Re: Formula - If you formula feed, what do use? Heard of organic formula but not sure how good it is.
Jamie