After a lot of research, we decided on the Britax Nautilus. It is a car seat and a booster so hopefully this will be his last car seat. It came on Thursday and Mason was pumped about the box! He kept saying "ohhh my big boy seat." We waited until Saturday to put it in and talked about how this seat was for big boys and how he was a big boy now. (more to come on that soon...)
TAADAA! We love it! He has so much room!!