rowekmr I agree a fiver tows better right out of the box vs. a TT. However your TT can tow just as well with a Hensley or Propride hitch.
Your comments about being sucked in by the 18 wheelers is one of the biggest benefits of a Hensley.
My 39' 10.5K loaded TT with a HA hitch towed just as well as my current 5'er.
Many are skeptical and don't believe the premium hitches work. However now that you just towed a fiver you are at that enlightened stage now that you have experienced how much better it could be.
A premium hitch will give you the same enlightenment as a fiver.
The catch is most feel their combo's are as stable as possible until they experience something that is a day vs night improvement. You have had the experience a now realise/understand how much better the tow could be.
I'm not trying to discourage you from going to a fiver. I moved from a TT to a fiver and it has been great.
But I just want to point out that a premium hitch will give you that same "Day vs. night" "A-Ha" moment that you experienced towing a fiver