I'm going to try to keep this focussed on towing hardware...
I'm seriously considering this:
https://www.realtruck.com/b-w-tow-st.../ts10038b.html
This seems to be a good adjustable ball hitch. I've heard that some other adjustable hitches fail. From what I have read, this one seems good. I've searched this site for B&W and found nothing here about it.