My baby used a $80 bassinet up to about 10 months. Really nice because she can sleep and we can carry her home without disturbing her. After that, I have a Safety 1st (Australian) rear facing + fwd facing convertible which costs me about $250 during one of the Taka sales. That can be used up to 18 kg in the fwd direction and is still being used in my dad's car.
For my car, she has a sunshine kids fwd-rear convertible Radian 65 which can seat up to 65 lbs. The sunshine kids is foldable (but rather heavy because all metal) and is FAA certified so it can be used on aircraft.
http://www.skjp.com/products/skjp_radian_65.php I bought this from a shop in Paragon for about $400.
The usual minimum weight for fwd facing set up is about 11 kg and never set a car seat in the front!
Our cars do not even have the top anchors that is recommended by most seat manufacturers so I had it ordered through nissan and installed myself. Interested can take a look at set up during Megameet.
My girl has been in a seat since the day she was brought out from hospital and there are no exceptions to the rule so she buckles herself in now.
Be safe and as the Aussies say: "Click clack, front and back".
