I am flying a 8.5lb Extra 300 with this setup: Tacon Bigfoot 60, 80 amp HV speed controller, 6s battery system with a 15X10e prop. I am getting 1150 watts with a 50 amp draw. I can fly for around 10 mins with no problem. This setup would probably work in your enforcer as well. APC makes a 15x10e pusher prop. Here is the link:
http://www.apcprop.com/ProductDetail...Code=LP15010EP