if you load close to its GVWR then you might want to consider the 8K. it will ride better. Otherwise the 7k will serve you well. This applies more to full timers who are carrying a full compliment of gear, clothing etc as opposed to part timers or vacationers who are more likely travelling much lighter.
We full time in our rig and upgraded to 8k with IS and we are close to GVWR. Fiver rides well. YMMV as they say.
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2017 RAM 3500 Laramie CCLB Dually CTD Aisin, OEM auto level rear air-ride, B&W hitch
2020 3813MS Legacy Cobalt FBP, MORryde 8K IS & pinbox, PI EMS,DIY mods by in-house "craftsman", RV security system Mk1 Beagle Alerter
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