XP 5000 seems to be popular for its cost effectiveness. I think the amount of absorbency would usually only be necessary for overnight or extended events like plane flights. But perhaps if someone is prone to sudden and complete emptying of an unusually large bladder.
That being said, I understand the desire for a diaper that is guaranteed not to leak. In that case, if you typically void up to 400ml, it would be comforting to know your diaper won’t come close to leaking.