hello. first of all, congratulations. yeah i know about the breaking down part and buying a whole lot of diapers before the baby comes. i experienced it as well.
i believe you already have a good plan there. just buy trial pack before you commit to any brands. better yet, you can buy/trade from other forumers here. you can save and get to try many many types of diapers. each baby is different, and they will may need different types of diapers at different stages.