E.H.
Congratulations on your soon to be here baby. The nice thing about the Britax rear facing infant seat is that it will accomodate taller babies by about 2 inches. Lets you use it longer - my daughter grew out of her first Graco by 6 months, even though she was still in the weight category. I'm sorry I don't have info about compatible stroller systems, I know people who use a Kolcraft car seat carrier with it, but that's all it's for - can't use it as a regular stroller later. You might want to think about having a baby sling for carrying your baby while you are out and about. I found it frustrating to have a crying baby in a car seat stroller and would end up carrying her and pushing the stroller. Crazy.