A momentous weekend we had, infant car seat to big boy car seat. The straps didn't do up in the infant car seat over Castle's puffy winter coat. We must have done weeks of research picking out the infant car seat. As a new parent it takes a while to sieve through all the choices and look past the marketing.
For those who are interested, we chose the Chicco Key Fit infant car seat due to it being lightweight, easy to install, good value, and compatible with the stroller we picked out. One other discovery after the purchase was that it rocks. Both figuratively and physically, it has a curved bottom so we can rock our baby in it. The only short fall is that the straps are not very long, hence moving onto the big boy car seat.
For the big boy car seat, we chose Sunshine Kids Radian XT, based on that it's the narrowest one out there in width, so it doesn't take up two seats in the back, and we can fold it up and take it on an airplane.