We have the '12 Ecoboost, SuperCrew, short box, with Max Trailer Tow Package. You will love that truck, and will pull that light trailer like it's not even back there. We had a travel trailer that was 7,000 fully loaded, and we'd pull that up 7% grades at whatever speed I chose, and pass when we wanted. I've since installed a custom 91 octane tune, and its really a beast. (Cue the weight police) I currently tow our Reflection FW, which is 10k fully loaded. I can pull up the 7% grades at 65 mph, and only have issues at 100 degrees (Arizona). Then I need to slow to 45 mph, and all is well. You will love that truck.
And for the weight police, I'm now in the market for a full ton diesel.