As for which hitch to use, my dad and I have used the equalizer on all 6 of our trailers and have nothing but praise for them. One great benefit is that you do not have to purchase a separate stabilizer for trailer sway, it is already built in. It is strong enough to make your truck and trailer level, provided you have the ball height at the recommended height. You will not be disappointed, and as for noise, I only heard noise when I had to make tight turns in backing into a spot and that was on my 1968 35 footer being pulled by a 1972 Ford LTD.
I cannot comment on the suspension, I have not read anything averse about Dodge trucks and trailer pulling.