We had to buy a new car recently and bought a 7 seater 07 Territory. It has plenty of room can fit 3 car seats across the middle seat and has anchor points in the 3rd row. Also, when the 3rd row is up you can still fit some luggage behind the seat. There is heaps of room and like you, we move every 3 yrs. So far we have found it great. Only downside is the petrol. It costs us around $90 to fill and does about 500-600kms round town. You may get more if you do less driving in suburbia. Overall though, that's the only downer we have found to this car. We paid $22000 for ours and it only had 77000kms on it. It was the best option for us in our price range. Only thing we wish was that we'd been able to afford a diesel territory. They however, are about $42000.