What I really want is a dual speed pump, capable of 3500 psi and between 5.5 and 6.5 gpm at 1450 rpm, and more GPM when I speed up the pump to 1750 rpm with a different pulley for soft washing. And the icing on the cake would be some sort of clutch, gear reducer or pulley setup that can adjust speed without messing with engine rpm or swapping out pulleys, but I don't think that exists.