I wonder if you could get longer bump stops for the rear to limit the compression a bit more....
Your rig really has me 2nd guessing my plan. What is the width and backspace on those wheels???
The stance is perfect with those 285s, to the point that 265s may look small.
.... the MTR Kevlars come in a 275/70/17 which may fit the bill a bit better to prevent rubbing offroading but still fill the wheel wells nicely.... I just wish more tires were available in that size: its either 265 or 285 if you want options.
Also can you snap some pics of the JBA UCAs installed and your CV & tie rod angles? I've been wondering how they all look with the 4" SL. If the look stock, I may consider a 1" spacer with the SL to help clear the 285s... and sleep better at night!