Hmmmm I'm not the best with fitted nappies as my DD is not a very heavy wetter but one of my demonstrators has a super wee-er (he is our out wet it tester) and her favs are the Happy Heiny one size with both boosters and Bumgenius.

I'm racking my brains, I know a few ladies use Baby beehinds and love them but they are snaps, velcro fitteds for heavy wetters.... happy hempy pocket fitteds is the only one I can think of. Will get back to you if I think of some others