I looking for a convertible recommendations for a larger baby. At his 4 month check up, our ?little? guy was in the 90 percentiles for both height and weight (18.5 lbs, 27 in). He?ll be outgrowing his Britax Chaperone in the next couple of months. I?m looking for a seat that will allow him to rear face as long a possible while fitting well in our Chevy Equinox. Please recommend your car seat for larger babies!