Type of Hitch to Purchase

I have a TV- 2014 Dodge Citadel, 5.7 hemi. 3.09:1, GVWR 7100 lbs.; TT-2014 Sport Trek, 250VRK, UVW 5270 lbs., Hitch Weight 500 lbs., Carrying capacity 1230 lbs., GVWR 6500 lbs. -- I have 4, 300 to 400...