Equal-izer Hitch Bars

Hey guys

Will be getting a new Imagine 2800BH next year and looking into getting a Equal-i-zer Hitch

I did the hitch size calculator on their website and it is telling me to get the 1400 lb version.

GTW - 7995 lbs
Tongue weight - Dry 604 lbs - Rough actual - 13% is 1039 lbs
Cargo weight in bed of truck - 400 lbs

Truck hitch says max is 1250 lbs

is 1400 lbs bars to stiff or should I go with the 1200 lb version

All figures are estimates but close