Weight Distributing Hitch ?

I have researched this and I am still somewhat confused as to what to do. I
am buying a new 2007, 3326 King TM and was going with the Reese Trunnion
Style WDH that my dealer was getting for me. With my expected loaded tongue weight of 750 to 800lbs I wanted the 1000lbs bars . The Trunnion is rated at 600, 800 or 1200lb. I called Reese and they said the 800 would be maxed out and the 1200 would be to much. They said go with the 1000 lb round bar Reese. I have noticed many TM owners going with Equalizer WDH despite the factory advise of not using any sway control . The Equalizer seems to be a little easier to adjust from what I gather. My truck is a 2005 Double Cab 4x4 Toyota Tundra with the factory tow package. What hitch should I use?

Dave