Read what your door says for remaining payload. My tongue weight comes in about 700-800lbs loaded wich leaves only 400-500lbs remaining payload. If you have a lot that you put in the truck, be aware of that. I use a WDH and drop 2-3" in the rear when hitched. I get a little bounce, but it is not that bad, really.
With a dry hitch around 840, you will be really pushing limits when loaded. Figure your tongue will probably be 900-1000 loaded and will severely limit what you put in the truck (people included) If you are within your limits, a set of air bags or Timbrens will help the bounce a lot.
TV: '06 Ram 1500 SLT QCSB Hemi 4x4
TT: '12 Grey Wolf 27BHKS
Tow Acc: Tekonsha P3 BC, Curt round bar WDH w/sway control, CIPA custom fit tow mirrors