If you have been having issues with sway, you first need to look at all the things that can contribute to it. Use max sidewall psi on TT tires (except maybe the GY Endurance), increase pressure on TV tires closer to max psi, use LT tires on TV, set trailer to level to slightly nose down. Go to a scale and see what the actual tongue weight is - you want around 12-13% or a bit higher. A scale will also tell you how much payload/cargo you've added to the TV when fully loaded for camping. Then compare the total added payload to the TV max. payload rating.
Make absolute certain you have the WDH adjusted to transfer the correct weight back onto the steer axle. A well set up overall package will reduce sway to a min. No need to spend megabucks on a fancy dancy WDH to mask underlying issues.
We have a Reese dual cam WDH. Because I love it so much, you should get one too. I like it's self-centering action. Does take some extra fiddling to set it up properly initially compared to others but when you've got it right, it's like wow... There is no sway with our setup and it handles great on twisty roads at speed.
And don't let an RV dealer or hitch shop install it. Install it yourself and learn how to set it up yourself.