well, my rear set is just fine - I'm just thinking for the fronts. The extra weight of the KL is now playing hell on the bumpstops.....it's heavier than I initially thought:
FSDE = 390.2 lbs
KLDE = 474 lbs.
My springs are Tein S-Techs and my struts are Tokico HP Blues, which in my car - ride soooooo smooth because of the added weight, but allow bottoming. So, I was looking for someone's front coilovers or stiffer springs. I've seen people sell just the fronts or rears or give discounts because the rears are blown but the fronts are good...something along those lines.