WD Hitch - Selection Questions based on TW and GVWR

I replaced my truck's hitch receiver a year ago (Curt X Heavy Duty) when I had my Outdoors RV (TW 1200#). Receiver is rated at 1700# of TW but it is 2" receiver. I believe all WD hitch systems rated over 1500# of TW are 2.5". If I went with a 2000# WD hitch system, I would have to purchase another truck receiver.

Is a 1500# TW WD hitch system enough? Guess I need to purchase a tongue weight scale and go from there....just hate to have to purchase another receiver when the one I have is near new.