I leveled my 07 with the truxxx leveling kit. 3" up front, 2" in the back, spacer kind. I have had zero issues with the spacers. The only thing that worries me is that the ball joints are not sitting level anymore, more like a 20 to 25 degree angle which means the wear and tear will probably be quicker.

Tell your wife she will not be able to fit in most parking garages after the lift. My roof rack has quite a few scraps on the top from hitting.