Haha, yeah, I would get a P-metric AT and be done. The Wildpeak AT3W would be my choice again for P metric.

Your new suspension should improve handling. LTE would improve that, too, but at the expense of comfort and the 5100s are not known for comfort. As for LTC, it is supposed to be the happy middle ground but I wonder if it is not the worst of both worlds instead.

With an LT you have to constantly fiddle with psi for different driving scenarios. The P metric goes everywhere at 32 psi.

I might move to LTE Toyo or Destination XT next year but that's because of very specific southern AZ realities. And even so I will probably just get another set of P Wildpeaks. Too many pluses to those.

EDIT: On the flip side, running LTD/E should be great for fine tunning, running anywhere from 15 on bone-jarring trails to 50 when fully loaded on western interstates. It is like having an adjustable spring rate. By contrast, P is ideal for not fiddling with psi, should not really be run under 28 except for very soft and deep sand. Similarly, even 36 is a bit too much on the freeway. I keep it there on long distance drives out of state and my center wears a bit faster than my edges.