I used to pull a 27' trailer that weighed about 5200# with an '08 Explorer with the tow package. As you mentioned the vehicle is more than rated to pull that sized trailer unlike all these people pulling 5'ers with Tundra's. I use a 10k Equal-i-zer hitch. I can remember coming back from Virginia Beach a couple of years ago. There were some nasty cross winds. I had no trailer sway but it certainly push the vehicle and trailer sideways. My guess is you would enjoy trailering a lot more with a better hitch.
2012 Lacrosse 318BHS
2010 F-150 Max Tow