Quick FYI:
convertible seat=rear-faces to 30, 33 or 35 pounds, forward-faces to 40, 55 or 65 pounds.
combo seat=
forward-facing ONLY seat that converts to a belt positioning
booster when the harness is outgrown.
Britax 65 pound weight limit seats or the Fisher Price Safe Voyage Deluxe are your best options. They have the tallest seat shell to make sure baby doesn't get too tall to rear-face before reaching the
rear-facing weight limit.
The Fisher Price is made by
Britax and is a
Marathon clone without the
rear-facing top tether and built-in lockoffs.
__________________
-Jenny
Mama to Hayley Rayanne
5.5 years old, 48 inches & 48 pounds
in a Britax Husky, Britax Parkway
and Compass B510