i use the Reese Strait-line WD system with the Dual-cam anti sway. it does take some time to get it set up properly, and will need to be adjusted if your tongue weight changes dramatically.
if i had to do it all over again, i would probably end up with the Blue-ox Sway-Pro. for the price and simple set-up, it can't be beat.
if money was no object, pro-pride or hensley would be the way to go. i never see them on Kijiji or anywhere local.
"Make Canada a better place, punch a Canuck fan in the face" - Jim Rome