On baby clothes... I'd say get the minimum until the baby comes and you see what size and shape she is.
My son was born in the spring. At the time he arrived we had a 2-pack of zip up "sleep n plays", a 5-pack of 0-3 short-sleeve onesies, a 3-pack of matching hats, and two pairs of 0-3 month socks. That's all we needed for a month or so! My son was 8lbs 9oz and long and skinny. He never fit newborn sizes, so I'm glad we didn't get any. If the 0-3 had been too big, it would have been easy to go get some. I think it's better to wait on bigger sizes and get them as your baby needs them. It took my son forever to grow out of 3-6 months so if I had bought 6-9 month ahead, they probably would've been the wrong season.
I know it's fun to buy things, but you'll save money and/or the hassle of returning things if you get the bare minimum before birth.
Also, Old Navy brand and Carters brand onesies ran longer and skinnier, which was great for my son. Circo and Garanimals never fit well cause they were very short and wide. Since I waited, I knew what brands worked for him.
In my opinion u can't ever ha e enough onsies, because they spit they poop and u will consistantly be changing her. I wouldn't go to over board with onsies though. Google iy I believe I found a site not to ling ago that Saud how many of what u should have, and I thought it sounded fairly reasonable...