Best car seat for a smaller car?

babynugget

I was wondering if any of you ladies could recommend a car seat that would be good for a smaller car (I have a 2003 Toyota Corolla). 

I was thinking about getting one of those car seats that can grow with your child (convertible car seat???) but was wondering if it might be too big to fit in my back seat.

For those of you who have similar size cars as mine, what kind of seat did you use?  I feel overwhelmed with picking the right seat--there are so many!!

Thanks for your help!! )