Thanks for all the replys! Im actually only going to be using about 11A max @5V which is 55Watt I was just throwing in a little safety factor which is why I said 70Watt. So 60Watt would probably work fine.
I have no problems using surplus parts, maybe I should look around my area for some...
With all of the switching power supplies what kind of a load would I need to maintain? I am not too familiar with these types of supplies.