Which brand of diapers do you recommend which is cheap and good? Where to get them?

My boy is using KCA aka Onwards. I usu stock them at baby fair as it's $44/ctn (4packs in it) and buy 4ctn there's free delivery. so I don't have to lug it home frm east to North.. So far I have no problem with leakages for my boy esp when he is of a bigger size thn average babies.