New technology is fun but if what you have does the job why change? With you trailer I'm going to guess you would have a loaded tongue weight in the 750# range. It's just a guess. So bars at least 800# would probably work but I would go for the 1000#.
I pulled TT's for a good 100,000 plus miles over the years with an EazLift chain type hitch with two friction type sway bars. It did a good job and was cheap. I just replaced another one, wore it out, with an EazLift Trekker only because it allowed me to get rid of two components and the end of the bars are grease free. So, moral of the story, get a newer hipper hitch if you want to or just use the one that works.