I have a 18' XD 5.0 with 34k on it. I sell trailers and tow pretty much any configuration you can come up with. I really enjoy the ride, better than my F-250 I had. It handles the same weight I towed with my F-250. It will not out run or out pull a 3/4 ton diesel but it aint no slouch with 550lbs of torque. Pretty close to the same torque as my 04 Dodge 3500 with 5.9 HO. Have no fear it will pull its tow rating well into the triple digits if you dare to go that fast. Loaded to capacity and running 75-80 with ease and MPG in the 9-11 range depending on wind. I just bought a flatbed a guy had built for his Titan, it will be going on in the next month or so. You can cure the pedal lag with a pedal commander. I am hesitant to delete, I do not want to lose the 5year/100k warranty just yet. I also have a 17 regular cab 4x4 titan with 5.6, now that little truck is a hot rod. It pulls pretty **** good.
I have driven 1 ton and 3/4 tons for about 30 years now. The XD has great room, I love the interior, mine is a SV. It rides extremely good, thats one of my favorite things about the truck. I do not hesitate to hook up to 15k and run with it. Mine has the factory GN hitch, brake controller and they work same as any other truck. The only thing I hate about it is the 26 gallon fuel tank, especially when towing. It was pretty tough pulling out to west Texas and having fid a fuel station every 200 miles or so. I added a 39 gallon fuel tank and graivty feed into stock fuel tank. Its and wide at the bed and 9" deep so I do not lose much of the truck bed. I am not saying it has the same payload or tow rating like 3/4 or 1 ton, but it does pretty darn good. I have a lot about the 16' models having issues. If you want the 5.0, better get it pretty soon as 19' is the last year for it as posted above. I am waiting until end of year or after to buy one for the shop I run, I am hoping dealers will be ready to slash price to move them.