DS is 22lbs and 15 months old in the Keyfit 30. His head is no where near the top of this seat. The top harness slot is below his shoulders but not by a ton. When does he need a new seat? Is it related to the harness height?
Also what should he be going into next? I plan to keep him rear facing and right now we have an expiring Boulevard which we like, but obviously needs to be replaced. For dd we have a Nautilus and a Recaro booster. She is 6. We have a new baby coming near the holidays so I figure the Keyfit can be handed down. What is the currently best rated rear facing after 20lbs convertible?