Hi again...another question...

I am due in September with my second. My first will be 2 in October. I currently have the chicco key fit, snap and go, and city mini from the first child. My son is tall and looks like his head will be hitting the canopy soon which is ridiculous! What should I get for the 2nd child. Do I get a side by side a front and back a sit and stand?? I don't have a clue. I want something practical, light and easy to maneuver. Thanks in advance.