sit and stand

Chelsey68

So we bought a sit and stand since we will have a 4 year old and a new born, but i used the baby trend carseat with my first son and it was so heavy and bulky. Does anyone know of another carseat brand that will work with the babytrend sit and stand? 

I realize i could go to babies r us and try them out but its far away and i wont be doing that for a while.