Congratulations on your little one!
Good suggestions above
Honestly, it is entirely up to you. Baby formulas are all nearly identical - the FDA regulates them so strictly.
The best place to start is your hospital where you plan on delivering. Each hospital provides mothers/babies with formula for the duration of their stay. Generally they use the 2 oz. nursers. (
Enfamil Premium Lipil Nursette 20 cal Ready to Use 2 oz Bottles - 48 Pack - Buy at Diapers.com - Fast Free Shipping) They come in ready-to-feed form and in a bottle. It is also generally the basic, ironfortified formula from whatever brand. (Enfamil Lipil, Similac Advanced, etc.)
I would call your hospital and ask what brand they use. If you want to use what they will be providing, then go ahead and stick with that. If you don't run into any problems, that's GREAT! If not, your pediatrician can also suggest some alternatives to help solve any feeding problems you may run into like gas or acid reflux.