The 2-port version lets you share the love. I can tell you from experience, this is a sure-fire way to make friends. ;)
I have just finished replacing all my chargers with Anker chargers. I have the Anker two port car charger (http://www.amazon.com/dp/B00D82O68Y/) the four port wall charger (http://www.amazon.com/dp/B00L40YJ8O/) and the 9600mAh external battery charger (http://www.amazon.com/dp/B00DMWV3EU/).
I have also replaced every single micro USB cable with Mediabridge cables (http://www.amazon.com/dp/B004GF8TIK/).