Brickie We've been thinking about the same thing. Whether to get an infant carrier to start with and then something bigger later on, or buy something that stays fixed in the car that will go from Birth - 4 years.
MOney wise i'd prefer to get one that will last all the way through. But my Mum and a friend have all pointed out that we'll be having our baby at the coldest part of the year and it'll carry on being crappy weather for at least 3-4 months. Getting baby strapped in, covered up etc. indoors and just clipped in the car should be easier. Otherwise you've got to take them out in the cold, get them strapped in and covered up, all in the cold/rain. Apparenltly you shoulnd't put babies in their car seats with coats on, is this the same with snowsuits?
I'm not keen on clipping the car seat onto the chassis of the pram, but again, my mum pointed out, if they haven't slept well and you've finally managed to get out of the house for ten minutes, the last thing you want to be doing it waking them up transferring them into a carrycot for a short time.
Despite all that, i'm still undecided!