Dealer I purchased from installed Pro Comp. Said it was only lift they installed that wouldn't void warranty. I'm still waiting on Exp One front and rear bumper for final determination, but it's a stiff ride compared to stock. I've yet to actually ride in any other FJ than mine, and I've got about 2500k on Pro Comp lift, for back ground on my comparison.
One note, Pro Comp lift with Eagle 100's and BFG 285/70/17 rub. Have yet to do body mount chop, but it's inevitable.