Super happy with my Ironman Foam Pro Lift. Initially it will be over 3" before it settles. Fronts are adjustable, and you can add weight with sliders, armor, etc.
I just did 20 miles of snow moguls, there was zero fade, no issues with bottoming out. Foam pros are almost 3 inch in diameter and dissipate heat really well due to no having any air.
Friends with billies tend to hit the fade pretty quick, Fox, King, and Icon tend to be bit over pirced imo.