You made a good choice with the F150 Gallie and you should be very happy with it.
As for the EcoBoost, I've got a 2013 Lariat with Eco and absolutely love it and my next truck will have one too. Really nice low end torque and that's why I bought it.
If your buying a truck to pull heavy boats and your worried about gas mileage, your making a mistake. If your not too concerned about mileage, buy a truck and enjoy.