This is really a challenge. I started by choosing a car seat (the Graco 4Ever convertible option) that would last through the baby's toddler years and up, but then when I moved over to strollers I realized my choice wouldn't attach into my stroller pick. Then I moved onto travel systems so I could purchase a stroller/car-seat combo but none of the car seats that come in these combos are convertible through the toddler years (in which case, you'd need to purchase a new car seat once the infant one is grown out of). I assume these companies planned it this way so we'd be forced to buy more stuff. Any help/advice/work-arounds?