I'm going to use an Anker 10 port hub. 4A @ 12V. They make good quality stuff.
I got a 6000mah usb battery from "Anker" with a integrated flashlight, which died after 3-4 months of usage. (battery is fine, just the flashlight isn`t working anymore) On these grounds i wouldn't stick my usb miners into a very cheap usb hub.