Just my personal experience from going from one hitch type to another.
I had a 2005 Keystone Outback 25' around 5400#. I used a Curt weight distribution hitch 1000#/10,000# (bars and chains) and a brake controler without a sway bar until I almost wrecked with a E-250 cargo van when the trailer sway got out of control. The trailer on it's last pivot was @ 8:00 to the van @ 60 mph. Somehow, it got straightened out and all the was needed was to clean up all the stuff that got thrown around in the camper and of course I could have used a fresh pair of underpants.
I added 1 friction type sway bar to the setup but still would have the feeling that the trailer got squirrely in big winds and the semi's would suck it in.
I traded in the van because I felt it was not the right TV for the job. Always white knuckle, 2 hands on the wheel.
I bought the 2011 F-250 with integrated anti-sway, brake control, tow and heavy duty service pkg. It pulled the trailer much better power wise but the trailer still had the same tow issues.
Last Saturday, I traded in the old trailer and bought a 34' 2011 Coachman Express 295RLDS (I think about 1000# heavier) and upgraded to the Equalizer 4 point with built in sway control. Man, what a difference. I was driving @ 65mph in winds and snow with 2 fingers on the wheel. The trailer and hitch was night and day. The semi's did not even budge the trailer, the winds I could feel push the trailer like a sail but did not contribute to any type of sway condition.
Although I have only towed with the new trailer and hitch for 40 miles home from the dealer, I feel that this new hitch setup will make for much nicer trips to and from our campgrounds around Ohio. The difference in price was around $300 more for the equalizer but not having white knuckles is priceless.
Good luck with which ever setup you go with.