Sit and Stand?

Samantha • Wife 💍 & Mother 👧🏻 3/27/11, 👦🏻 4/7/13, 👶🏼 1/27/19

My best friend is due with her 2nd son in December. She’s looking for a sit n stand type stroller. Just curious as to what everyone recommends, and if the actual sit n stand stroller is compatible with Graco?!

Side note: I have the baby jogger city select lux, and her older son (2.5) is too big for the seat!