Murph I pulled the numbers from my head and from a website to double check I was remembering right.

http://hitches4less.com/trailer-hitch-classes.html

I would recommend going one step beyond the load distribution to an anti-sway system, Reese makes a dual cam style that effectively locks in the trailer while straight ahead but when turning the arms simply slide over the cam. I found the dual cam to be much superior to the friction style.

http://www.reeseprod.com/video/runvideo.asp?video1=WDDualCamSwayControl.flv

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70