Many thanks

, how much should I be looking at spending, we are a family with 2 DD's who will be 10 & 8, and what cat cabin should we look at?
Well the budget is down to you, my kids are the same age and we have a CAT 4, but its up to you if you want to spend less or more, inside or outside cabin.
For cruises less than 6 days I say inside cabin, for longer cruises 7 and more a verandah is great for sea days.
Shore trips, drinks and tips add to the cost, but it depends on what you wish to do,
I will spend $2k at least on an on board account, but thats shore trips, photos, tips, kids buying in the shops, pins etc.
You can get away with far less, if you do it yourself at the ports, for example.
I will suggest a 7 day cruise is best, a 3/4 goes to quickly, so then for your family of 4, price up the cost on different CAT's and go with your budget, Whatever Cat you get, (below Cat 3) you get the same service, food, Entertainment, the cruise is the primary vacation, the cabin are all nice, to have a verandah, is great, but not essential.
Also if you book with
Dreams unlimited they will answer your questions nad give you a shipboard credit.