[wingnut60]

WhoDat,
There is no industry comparison chart for hitches, but suggest you look at etrailer.com for some info. Also, consider the turnoverball.com for B&W hitches. Trailair is another often seen hitch. The bigger and more elaborate the hitch, the more weight it will add to the vehicle...and take away from available gross and pin weights. About 18-20k rating will be plenty.
Whatever, I would not consider buying a new truck that did not have the factory-installed 'puck' mounts already in the bed---just too much of a hassle to get it done after the purchase. Much cleaner system overall.