What type of dog is best for my family?

[gerrydevis]

Hello I know other people have asked this question sorry! I have 2 children aged 3 & 4 I live in a house with a small garden and we are thinking about getting a family dog. I like small terrier type dogs like westies but my partner likes bigger dogs like german shepherds. We are looking for a dog which would be friendly and easy to train and hopefully get on with young children and cats. I would also prefer an easy to care for dog which doesn't need constant attention and grooming. Thank you for your help.

Additional Details
Mandy P - I didn't mean that the dog would get no attention it would have to contend with two kids. I mean I want dog who will go settle down not barking and running around all the time.

Thank you Dr X we have been discussing getting a dog for a while now and my boyfriend and I have owned dogs in the past so we know what a commitment it is.