Yuba elMundo

Petaluma, California-based Yuba Bicycles is known for its well-designed, do-it-all cargo bikes. But Yuba also knows that hauling
two kids, groceries, and other sundries around town can get tiring, especially if you live in a hilly area. That's why they built the elMundo, with a 350-watt BionX hub-drive motor and four levels of pedal assistance. Surprisingly, for a bike with a massive wheelbase (and that’s anything but light at 66 pounds), the elMundo handles amazingly well and offers a smooth, comfortable ride. 
[$3,199; yubabikes.com]