Ittis are FAB!!!! they are not really made for heavy wetters, however you can buy mini boosters to add absorbency. The snap in ones are the outer shell and boosters separate so you can pull apart and dry separatley however i find they still take longer to dry than the all in ones which have the booster sewn in. The snap in ones are more absorbent IMO and I find them trimmer. I like having both in my stash weenotions are a firm favourite and best with ptits dessous inserts. I have tried lots and lots of different nappies and they are my absolute faves!
Others I have tried and liked are bumgenious and blueberries.
As for fitteds for a newborn I would reccomend little lambs or terry squares. I used PUL (plastic) wraps for the newborn stage as i found they were good for containment of BF poo! I know only use wool wraps or fleece becasue on chunkier thighs i didnt like PUL which left red marks (fine on skinny newborn legs though!)
A nappy bucket is a good idea or you could just have a XL wetbag next to the washer. any other Q's just ask!