Extended Fit Car seat?

Jordan • Boy mama 💚 || Carl Anthony III & Carter-John Alexander 👨‍👩‍👦‍👦 || Feel free to chat with me 🤗
So my LO is almost 5 months old & measuring 27in long, which is super long for his age. Anyway, he's already getting pretty long for his car seat & I know he's far too young & small to be switch to forward facing yet. So I was wondering if anyone has used an extended fit car seat to keep their child rear facing as they grew? If so what brand do you recommend?