My daughters car seat is about to reach the 6 year old mark, i'm looking at car seats for her now... wanted to see some suggestions. She is almost 2 years old, weight is 24lbs and hight is about 34inches i think. She is rear facing most of the time unless it's a very long car trip and she wants to watch a movie with her sister... she's usally content just listening to it though. I was looking at britax marathon since she could use if for a long while till 65lbs ... but it's awful pricey??? Suggestions...