Just bear in mind the universal truism that a bag large enough to fit all your kit will be too heavy, and one light enough to carry will not fit all your kit.
As the curator of the National Camera Bag Collection (11 and rising) I am awaiting a new technological development in which all the padding is replaced by helium-filled pockets. Meanwhile I try to decide what I actually need to take, and then pack a bag which is only just too heavy rather than giving an instant hernia. Unfortunately the sherpas are on holiday at the moment and have taken the yak with them.