That really depends on what u want to do with it and where u want to drive the vehicle (ie: Remote off-track desert driving). I know from my trip last year that 95ltrs would not be enough and when u have to use valuable cargo space to carry jerrycans inside the vehicle, that is not ideal. I guess u could carry them on the roof but that creates other issues...
btw: the Dynamic Roofack limit I was told would be 100kgs but they could not tell me the static rating... I asked the Ineos guy if there was a fair bit of a safety margin built into those figures... he just nodded his head ;)

