Researched them all...for my money, and unfortunately the most money...Hydra-lift. It'll set you back $5800-$6100 ($42-4500 for ramp and chuck, Amazon versus service center procured, and 12 hours installation). Allows for up to 8000 lb tow, the largest of any of the systems.
For my money worth it. Period and Exclamation mark. I do have a tag and agree with the previous poster; however, you can go to the Hydra lift site ad see the coaches they have put their system on. Service outfits also sy it is by far the best.
Dave and Beth
2015 Cornerstone 45J
Ford F-150 and 2016 Polaris Razor