I do extensive research on everything that I purchase and so I went with the Curt Q5 20K. It has great side to side movement, safety features, easy to disassemble and maintain.
We drove over 5,000mi from Washinton to Alaska and was impressed with it's performance. We also have a Reese, 5th Airborne kingpin which also helped make for a pleasant ride on those rough Alcan roads.
If you have a short bed, make sure you purchase the right model. Your parts/service Dept can help with this.