There is a wide world of carseat information out there. With the help of the moms of car-safety.org and my local CPST Brooke I finally decided on the First Years True Fit. It has a much higher shell than the Britax Marathon we were deciding between but the install is known to be more difficult and the Marathon is usually outgrown by height before the weight limit (both have a 35lb rear facing limit) is reached. Since our boy seems to be a tall one, the height factor won out. We plan to keep the boy rear-facing as long as possible so our choice in seats was influenced by that. Do you know about the benefits of extended rear-facing? Here's an overview of information if you're interested. Car-safety.org has a great page about it too
Is it just us or is he actually cuter in the new car seat?