Convertible car seat for tall babies

Katie • Momma to the most perfect baby girl in the world. 2/2/19 💗

My little one is 3 months old, and is already over 2’ tall. She won’t be in her current car seat much longer. Does anyone have recommendations for a convertible seat that works well rear-facing for talker kids? Inexpensive would be a big bonus - we have to buy two of them; one for each car.