hopefully one of the expert girls will pop in but I'll tell you what I have found worked best. Nate's been in cloth since the day he was born.

I know a lot of the girls use prefolds and a cover, or flannie flats and a cover. They don't need heaps of absorbancy as you change them so often, but thy do need to hold in that runny poo, that's why a good fitting cover for newborns is invaluable.

I used fitteds with Nate and covers for the first while. So I had one layer of elastic on the fitted and one on the cover (great for pootainment). They come in OSFA and sized. My faves are the Spunky Buts fitteds. I also have BBHs in hemp and bamboo. They fit much better now he's a bit bigger. Cute Tooshies fit well when they're little too.

When they are really little, sized or flannie flats seem to work best as the OSFA are just too big. Though Nate was big (9lb) he was still to small for OFSA for a few weeks.

Others use pockets and AIOs for tiny babies but for me they just weren't reliable enough to hold the poo in as their little legs were too small. Once he put on a bit of weight and grew a bit the pockets like Happy Heinies and BumGs were (are) great.

We have only started use a true night nappy in the last month or so, so initially no I don't think you should need to worry about them. That said I never ever had to buy one for Darcy as a boosted BBH with cover was fine.

I wish I had waited beyond the fitteds to see Nate's shape as different nappies suit different kids.
Aslo think about 12 nappies per day for the first little while and wrk out how often you want to wash. Don't forget about drying time.

HTH a little bit.