I worked my fitteds stash down to Flutterby fluff's, hollow oaks, weenotions northernlights, baby beehinds, Muttaqin Baby.
I only have 1 Muttaqin Baby as they are american and they are lovley and slim fitting but the absorbancy is compramised.
All the rest are suitable for heavy wetters. Kaydi is a super soaker so we know.....lol I find the flutterby fluffs, hollow oaks and baby beehinds last the longest. The weenotions are really lovely and are a great nappy but we have to boost them with a bit of hemp.
I have herad good things about the Puddlekins but we haven't managed to get funds for one yet.
If you looking in the reviews sections you should find some good information to help you too.
Also don't know if you use wool or not but it works so much better than wraps on heavy wetters.