mac
I been looking for soemthing like this to pop up on the 6.4 hemi.
The tow rating seems to be underated. The 2012 F 250 that I tow with is rated for I think something like 15000 ( as I recall).
Anyway we are towing around a 11.5K with our puny 6.2 gasser :W and have no problems.
So I would recommend not going too skinpy or you will be selling the "too small" rig and getting the bigger one and losing a bunch of bucks, at least that is what I did.
We needed the room considering the two dogs and three cats that are RVers also.
happy trails.
PS I am sure you are aware that the diesel folks, dually folks, and weight police are gonna beat you with a wet noodle. :B