Stroller for infant and a preschooler?

Any mama expecting baby number 2 and have a 3-4 years old? I’m trying to find the best stroller system which will work for us. Some points I’m considering:

1. Preschooler will be 3.8 years old when baby 2 is here so she won’t be on the stroller all the time. Just occasionally for travel, zoo, park etc. So a toddler stand board/seat attached to the stroller might be good.

2. Infant stroller that includes car seat and bassinet

3. Lightweight- ideally

4. We already have a stroller for 6m+ baby so we’re trying to save that for baby 2 and add the toddler stand/seat to it

I’m looking at the Graco Nest stroller system and it seems to fit the bill but would love to hear if you have any other ones that you love 💕 thank you very much!