WD Spring Bar Sizing

Since our kids are long gone, and the old bunkhouse was getting a little long in the tooth, we went out and ordered a new Coachmen Catalina Legacy Edition 223RB today, and now I'm trying to figure out what to do about spring bars. The Husky Centerline TS I'm planning on purchasing comes with either 600-800 lb. bars, or 800-1200 lb. bars. The trailer has a dry weight of 5100 lb, with a tongue weight of 722 lb. These are brochure weights. GVWR of 7200. I'm leaning toward going with the heavier bars. What do you guys think?