I've heard that most children outgrow most car seats by height before weight. On higher weight limit convertibles (Boulevard, Radian, TrueFit, etc...), are they hitting the height limit before they reach the 35lbs turn around? Are any of these (or similar) seats being outgrown before they even have a chance to be used forward facing? I guess what I'm trying to ask is if there is one (or several) seat(s) that will allow for maximum (to 35lbs) rear facing based on the height limitation? Is there a "tallest" seat on the market?