With a growing family a big one will never go astray. There is nothing better than getting a meal out of the freezer when you need to. I have the 5.5litre (I think) and that is plenty big enough for 3 adults. Talk to the shop assistants and see if they have one and find out why they bought that brand against another. Am cooking tomato & onion sausages for tea tomorrow in it if I get up early enough before work.