I use the totbots flexitot size 2 on my heavy wetter. It lasts about 2 hrs on her and is a nice fit on her chunky thighs and smallish waist - she's 16 months and about 27lbs. There is a layer of bamboo velour-type fabric - which isn't as soft as a DnF or goodmamas bv - but behind that there is a layer of some sort of v soft microfibre towelling (sorry don't know the technical name!). I fold the inside of the nappy so that this bit is against her skin and it acts as a stay dry layer - doesn't stain either. It also comes with a a little bamboo booster. Might be worth a try?
My problem is I've discovered bv and custom dying and there's no going back!
Sorry - I should also mention that we have one Dunk n Fluff which is bamboo velour and I lurrve it! Absorbant, cute and stays soft without tumble drying.