I currently have a Toyota Sienna 7 seater (2007) and it if full. I have five kiddos (ages 6, 4, 3, 2, 8 months). My 6 year old is in a HBB in the third row passenger side next to the two RF radians for the 3 and 2 year old. The 4 year old is in a Radian on the driver's side and the baby is in a Cybex Aton on the passenger side. I intend to keep the three youngest RF to at least 4 if I can. That being said, I am thinking of needing a bit more space. We will probably have more kids at some point, but I would like to be able to bring a mom and her kid along with us when we go places on occasion. I have thought of getting the Sienna 8 seater (2012) since my car payment would be the same, but DH isn't convinced it would be worth it. We had looked at the Nissan NV, but the mileage looks like a KILLER! I have looked a bit at the low roof Sprinter, but the diesel costs are making me question that one. Is the 8 seater really car seat friendly? What about fitting 5 car seats and a booster? What would you do?