Which Bilstein shock is best for my RV?

That would be perfect- a big knob you could turn to tighten up control as needed. Today I was driving on suburban roads at 45 MPH and the control of the stock shocks were entirely adequate. In fact there would be nothing that would even hint a change was necessary except some rocking entering streets or driveways-which alone wasn't a big deal.

Not some automatic system either-complete manual adjustment..55-60 mph sweeping corners on good roads--crank her down...