We went from a 35 foot TT pulled with a 1 ton diesel dualy and we used the Equal-i-zer 14,000 - 1400 weight distribution hitch. The trailer weighed in at 11,000 loaded. We had the trailer for 5 years and it handled flawlessly.
I strongly, strongly suggest getting a WD hitch system, even with your 3/4 ton truck, but in reality ... if you really want to part with your money, a Hensley is not "essential" and the only one. For your combination you are anticipating, the Equa-l-izer, ProRide, and Reese Dual Cam will work great for you and cost a LOT less.
About towing. We went from a 35 foot TT to a 41 foot 5er. We've had the 5er for nearly a year now and the difference between the two is now mute. In a lot of ways, the TT was easier. It didn't have automatic leveling systems and near the height the 5er has. The 5er has more sophisticated electronics and, in a lot of ways even after almost a year, I'm still learning how to tow it. Believe it or not, I can back into any campsite with no problem now. But backing into my own driveway freeks me out! The biggest difference between the two is the trailer tail end swing when making turns, especially sharp turns.
Given a comparison between towing TT and 5er, because my truck was the right one for both trailers, and because I had a good WD hitch with the TT, both tow equally as nice.
I strongly advise getting the WD hitch. But definitely get one that has built in sway control and don't go with one that requires you to use a separate friction sway control bar. FYI, Equal-I-zer 4 point systems are very easy to hitch with. Very easy.
Good luck with your decisions. I can only share from my own experiences. Yours may be completely different. Still, the right truck makes all the difference in the world.