My faves are the bumGenius 4.0's with snaps. I love the 4.0's because the fit is excellent and they are virtually leak-proof. I also prefer snaps because my daughter can remove her velcro diapers (and she does!). bumGenius also makes an AIO with snaps, but I haven't tried it. I have one Rumparooz and I like it, but it has a really short rise so my 28 lb 21-month-old is just about to grow out of it. Lately I've been experimenting with fitteds and a wool cover for naptime & nighttime. I l.o.v.e my Wool Lover cover from Kissaluvs. Next I want to get some wool longies. And my favorite nighttime fitted is the organic bamboo fitted from sustainablebabyish. I lay a bumGenius newborn microfiber insert stuffed inside a bumGenius insert sock inside the fitted. The microfiber seems to absorb more quickly than the bamboo, which prevents leaks. And the insert sock acts as a stay-dry barrier next to baby's skin. For naptime I bought some clearanced Thirsties fab fitteds. They are so soft, but I try to stay away from synthetic fabrics for nighttime because they seem to hold the ammonia smell more than natural fabrics like cotton, hemp or bamboo. The only microfiber I will use at night is a thin 2-layer insert which doesn't seem to trap the ammonia like the thicker inserts do. Anyway, I am loving the wool!! You should try it!