Personally, from prior experience, I don't think you or your truck will be happy with this size of trailer. Once loaded, that trailer will probably be around 6500 lbs with a tongue weight of about 950 lbs or so. Sure won't leave much for you, passengers, equipment, tools, etc that you will put in or on the truck. You will definitely be pushing its limits. The length is somewhat worrisome, but if the trailer has sufficient tongue weight and you use an Equal-i-zer, I don't think sway will be a problem.
Good luck with whichever you decide.
Ron