Any second or third time moms out there?

Stacey
I have a stroller question...
​My son will be 4 by the time the new baby is born. Looking for a stroller than can accommodate both an older one and a newborn. 
​I'm thinking the joovy caboose  ultralight. I like the idea of the standing and sitting for the older child on the back, while the baby sits up front. It can also have a second seat added to the back in case I have a third,
​Or if my son gets too tired to stand on the back and wants to sleep.
​Anyone have this? What are your thoughts? Any other options you like? The graco one is out bc we don't has a graco car seat, and it only takes graco. Thanks!