J.,
My little one didn't want to take the bottle/formula from me... because, well, I had the goods. However, he took it like a charm from anyone else and as he became accustomed to taking it from others he would then take it from me. It was a process.
He was in NICU for a short while where he received formula and whatever I could pump. When we got home he went to nursing only and then at 3 months when I went back to work part time it was easiest to nurse when we were together and suppliment formula when apart. I was less stressed about finding somewhere to pump and he was getting plenty of nutrition. It was a happy comprimise for this Mommy who had never considered she'd WANT to go back to work!
We use Enfamil Lipil with Iron, it's what they gave him in the NICU and all the studies I've seen on it give fabulous results as to it's nutritional resemblance to breastmilk. You'll find what you and he like best though.
Like the other Moms say - trust your instinct, listen to your baby - you'll do great! Congratulations on getting him home! Enjoy every moment!
T.