You won't need a Super Hitch. The hitches on the 2017 models are designed to carry more weight than the previous generation. I had a 20k Super Hitch on my previous Super Duty and it was way overkill for what I am hauling. I have 12ft trailer I haul my ATV's on along with coolers, firewood etc. and I did not need a Super Hitch. Besides that, the Super Hitch weighed 175 lbs and the Super Truss Extension weighed 70 lbs.
With my new truck I got a Reese 2 1/2 inch extension that goes down to 2 inch which is 34 inches and it has a carry weight of 4500 lbs and a 450 lb tongue weight. Depending on how long you need, that same extension at 24 inches has a 6000 lb carry weight and 600 lb tongue weight.
It is so much easier to deal with than the Super Truss extension besides not having to give up all that weight. It was a heck of a lot cheaper to just have to get the Reese extension as well.
Below is the url to the one I have:
http://www.reeseprod.com/products/hitch-accessories/other-accessories/trailer-hitch-extension/hxyNMzUEThezO4ZpzhR4RkMsE576VeBN
2017 Ford F350 XLT Premium CCSB 4x4 6.2 gas 3.73 rear end, 4226 lbs payload
2017 Northern Lite QC 8.11 SE
Torklift tie downs, Torklift Fast Guns, Torklift Upper Stableloads, Airlift 5000 Ultimate air bags, Airlift WirelessAIR onboard compressor system