I realise this has been done to death but.... 
I want to use reusables - the best option to my naive eye are AIO, one-size, in a multi pack (saving aroung £60).
For this reason I was going for either Itti Bitti tuttos or Bumgeniuses.
The advice I have from a friend is get several different brands and see which you like, however I want to crack on from day 1 and needing around 20 nappies it seems like a waste of 1/4 to 2/3 of the nappies if I decide I prefer using one brand over the rest. My (naive) view is if I only have one brand I will know no difference 
Any advice?