I'm not sure if this is where to ask. My daughter will be 3 in July. She is 43 lbs and 41" tall. I currently have the Graco Smart Seat 3 in 1. But it is big and doesn't fit in my husband truck easily. We are looking to buy a second car seat. We want something that will still grow with her, but also would like the harness option as we are TTC and that way we wouldn't have to buy another car seat later on.