I have a B&W Turnover Ball hitch in the bed of my truck. I also bought the B&W Companion Fifth Wheel Hitch. It is rated at 18,000 lbs. The gooseneck ball hitch can turnover so that the truck bed is completely clear. You can also take out the gooseneck ball hitch, and install the Companion Fifth Wheel Hitch into the same location. Best of all worlds: clean bed, gooseneck ball, or fifth wheel hitch. See www.turnoverball.com
for more details.