I'm another one to proclaim the flats love! So economical, easy to wash, and they look precious on. Last time my favorite combo was a flat with a Mother-Ease doubler inside. I preferred to snappi them closed. I tried many types of covers - imse vimse, lite wrap, thirsties, bummis, mother-ease, hand-knit soakers - but in the end I much preferred the Bummis Whisper Pant, which is the cheapest pull on nylon cover you can buy ;) It looks like they've discontinued the style and replaced it with a similar pant made from PUL. Not sure how I feel about that change. At any rate, I have plenty of covers left over from last time so I don't think I need to buy any.
DH has requested that we get some "easier" diapers this time around, especially for night time changes. Last time we had a few fitteds, and I'm tempted to get more since I already have all those covers. But I really think he'd love a pocket diaper or all-in-one. I don't know... Maybe I'll get a few of the GMD workhorse fitteds and a couple of Bum Genius or some such for night time. I loaned about 10 of my NB size prefolds to someone and I don't expect to get them back, so as far as tiny diapers go I'm left with 2 fitteds, maybe 2 prefolds, and at most 24 flats. I think it would be nice to get a few more small dipes. I have more prefolds in larger sizes, as well as 8 Mother-Ease one size dipes, (and the previously mentioned flats,) so I don't really need anything in larger sizes. The only bigger ones that I'd buy would be a few more fitteds, for the convenience.
I'm honestly torn over whether to buy NB sized diapers because they are used for such a short period of time. And honestly, it is not the end of the world to fold down an infant size prefold or a one size diaper. As long as you can get the legs tight enough to prevent leaks! The main draw for me is really the cuteness factor :)