If you want the absolutely best weight distribution hitch with sway control consider the Hensley Arrow by Hensley Mfg. Go to the following website for details:
http://Nosway.com
Its pricy, but no smoke n mirrors. I've pulled an 8,300 pound GVWR travel trailer for over 30,000 miles with my 2001 4.4i using the Hensley hitch interface. It can handle a 1,000 pound tongue weight and a 10,000 pound GVWR trailer. Sway control is absolute without using friction. If you need more info do a search of this website for "towing" or "withidl".
Let me know if you need more info from me.