Looking for suggestions for a convertible rear facing car seat that will last a long time, and is somewhat compact.

My 6 month old is super tall and was encroaching the height limit on his infant car seat at his last appointment. I wouldn't be surprised if he will have reached it, or be very close at his appointment this coming Friday. Preparing for the future inevitability, at any rate.

We have a Maxi Cosi Pria 70 for the oldest, but it can be a pain to clean.