What size convertible carseat did you buy and why? I see that the Britax
Marathon comes in 55,65,70 (pounds). I'm just wondering if it is worth
the extra $55 to get the bigger one. I mean, will my LO be in a
different kind of seat by the time they are that big anyhow?
Re: (xp 3-6) - convertible carseat size?