We have a 2013 Lincolm MKX which is basically the same as the Edge. As for the SUV, we love it. It is a great size and very comfortable. The MKX comes with the 3.7 V6 which is the same engine for the base Mustang with 305HP. Ours is AWD. We have not yet set ours up to be towed but it is my understanding that many folks have done this successfully all the way up to the 2016s. We considered the 2015 Edge Limited at the time but the MKX had more standard equipment and we liked the looks better. Ours was a Certified used car which gave us peace of mind buying a used vehicle.
Some Lincolns have adaptive cruise control and I think the sensors interfere with mounting a baseplate so if the Edge has this feature, I'd check the availability of baseplates for that car.