Lucie's List suggests using an infant car seat in conjunction with a stroller because infant car seats are great for carting around babies and letting babies continue sleeping. http://www.lucieslist.com/baby-registry-basics/best-infant-car-seats-strollers/

For those that did not do this and used a convertible car seat from the very beginning I have a few questions:

1) Which convertible car seat did you choose?
2) Which stroller(s) and components did you choose?
3) How did you carry your baby around when not in car or stroller?
4) Did you find moving baby out of convertible car seat into stroller cumbersome and disruptive to baby's sleep?