I have an old VW Passat and I've been trying to decide on a new car too. I just have one 7 year old, but often wish I could transport more than one additional child. The car/booster seats take up too much room.
I looked at the Mazda5 - sort of a minivan/station wagon hybrid. It has three rows, which I liked, but I didn't like the two color seats in the leather option (red trim on beige seats). The third row was also cramped, so I think it would only be comfortable for kids/shorter teens.
I love the Odyssey, but can't justify the gas mileage when most of the time it will only be two of us in the car.
My sister loves her Toyota Highlander.
I was looking at the CR-V or RAV4, but saw they're sorter than the sedans I have been looking at, so I've ruled them out.
I was surprised how big the Sonata seemed, but I don't know if you can fit two seats and a fifth grader in the back.
I've been looking at cars for about eight months and still haven't been able to make a final decision. Good luck with your decision!!