Double strollers

Been looking into double stroller, decided to go with side by sides. Husband and I are trying to decide if it's worth getting a metal frame stroller for the infant carriers... Having a hard time finding a double stroller compatible with our carriers (Britax b-safe 35). Do we get both a carrier stroller and a regular or just go with the regular (double stroller)?

We are looking at the Joovy Twin Roo+ and the Joovy Scooter X2 Double Stroller

Moms of multiples, what are you getting/doing?