Had a chance to look at slow cookers yest.They seem way heavier than they used to be.
Like the rubber seal on HB & will prob go with a 6qt.There's just 2 of us, but I like making soup,then freezing some for another day.
About cast iron.Few yrs ago, DD got me a small covered cast irot pot.Food in oven cooks great ,but it's so heavy I seldom use it. Can't imagine what a large cast iron pot would weigh full of food.