my fav pockets are weenotion side snaps which aren't too pricey if you can resist the embroidery
or i'm a recent convert to fuzzi bunz sized nappies you can get them preloved quite cheapish or new for same price as a weenotion side snap
I tried bum genius when she was little and hated them but most likely as they were huge and she was tiny may revisit those too
hth,