I saw an ad (emailed to me from BabyCenter.com) for a Britax car seat. It’s quite expensive ($250 or so) and is supposed to work for babies and kids 5lbs to 65lbs, so that would take you from newborn to almost out of a booster seat. Almost all of the reviews that I read were positive, just a couple of people had trouble with their car seat not fitting the car or the straps adjustment or something. But they almost exclusively said that their kids grew out of an infant seat or changed to the Britax when their kid was 5 or 6 months old. Someone I met a few years ago said that their kid at like 18 months was on their 3rd car seat, so umm. what’s the difference? And I’ve seen ones that have a whole set thing that you can unlock and put your kid in different cars or in a stroller that all hooks together. I’d hate to invest a bunch of money in a car seat that doesnt work for a little little baby and have to have 2, but if you have to have 3 or so anyway, what’s the + and – of that?