The Anker 10 port 3.0 Hub. I have 2 of them with 10 miners plugged in each. The adapter is rated at 4 amps but if you read the manuals and stuff when you get the hub you will see that it can actually provide up to and past 7 amps although they don't recommend going higher. Its expensive though, about $50. It even has a built in surge protector. No idea if it will protect the USB miners from a power spike but I like to think it does  There is a cheaper 8 port version I saw on ebay made by another company but I forget their name