You do get genuine advice, but everyone has personal favourites, and everyone has likes and dislikes - for instance, in this house we prefer poppers to velcro (aplix) (it started as DH thought he'd never remember to do the velcro up before he put it in the wash, then we found that they didn't fit DS very well as they tend to be stiffer round the waist and he was chubby, and then as they get older they can whip them off)or nippas, and I think that a two part system is best for containing breastfed baby poo.
For a newborn you don't need to worry about boosters or liners, and unless your priority is ease of use, then all in ones aren't a great choice as they take forever to dry.
Materials - you have a choice of cotton, hemp, bamboo or microfibre. Bamboo and hemp are very eco as they don't need a lot of pesticides and weedkillers to grow, and are very absorbent, but do tend to get hard. A great choice for night nappies later. Microfibre dries very quickly.
I started off with xs Sandys and airflow wraps, then small sandys, then Motherease one size - staying with Airflow wraps. The Sandys are very cute on a little one, and you never get a poo leak. Mine did DS, a friends DD, and are now with a colleagues DS, then will get sold. Later, we've acquired rather a collection of pocket nappies, which are easier with an older baby who runs off when you are changing them.
My advice would be to lurk around on the nappy sales board here, join the Yahoo real nappy list and buy a selection of newborn nappies second hand - its no risk then and you can try them all out when your LO is born, and decide what you really like in a nappy, sell what you don't like, and buy more of what you do