Nic, I only have 1 original pb with cotton outer and a pb+ woth cotton outer, I have wicking problems with both and will be selling them on when I get some pics taken.
I am tempted to try a poly one, I think the problem is with the cotton rather than the style of the nappy as they are a really good fit on Georgia. If you get one to try I will buy it off you if you don't get on with it, that print is gorgeous
or I'd swap for a g-diaper