Help!!!! picking a Double stroller

Okay Ladies....I'm pregnant with my 3rd due 8/2/16 so most of the summer will be gone so I guess putting my stroller into good use may be the following spring maybe....My son will be 2 months shy of 3 by the time baby comes so I need good recommendation on strollers.I use my graco one that came as a set with the 360 carseat...pretty basic and I will be using the same carseat for this little girl on the way. The 2years old is a runner always in the go so a Double Stroller is a MUST LOL......side by side doubles or the front and back doubles ...Help!!!!! Thanks for any suggestions ladies I've seen the city ones look pretty nice but pretty pricey