What happens to the headlight alignment after installation of the brushguard or a Shrock bumper? Does the nose of Xterra start poiting down becasue of the added weight? If yes, what have you done to prevent it or straighen it back up?
You could add a rear Shrock bumper with tire carrier. That will level you out - although the X will be squatting a little bit.
My '06 XOR headlights were blinding everyone when I first bought it. I put in a 2-leaf AAL and all was good. Next, I installed front and rear Shrock bumpers, and haven't noticed the lights being a problem for other drivers (pointing too high) or myself (pointing too low).
When I add a winch up front, I will be adding beefier springs, longer coilovers, new UCAs and some shackles in the rear. With all that stuff added, I probably won't need to adjust the headlights.