I want dh to pick up a Britax Marathon to replace our Cosco Alpha Omega carseat this week-end. I want Simon to be rear-facing as long as possible and we aren't really happy with the Alpha Omega seat, and he seems to be too tall for it already though he is 27 pounds and it is rated up to 35 rear-facing (I didn't realize that a 35 pound child would have to be a short 35 pounder to still be within the height limit (36 inches), or maybe Simon just has a really long torso. Anyway... I'm expecting the Marathon to be bigger than the Alpha Omega. Anyone know if it will fit in a 4 door Cavalier (a newish LS, if that matters). I'm hoping that the moo print is available.