I'd stay away from shackles, honestly... They promote axle wrap... Leveling kits can be okie IF the front end is a coilover sprung IFS... If it is a torsion bar front suspension setup, sometimes the leveling kits aren't really all they seem... I'm not familiar with the new Nissan's.. One problem I can see with a body lift, is you'll have to find a way to raise that brush guard up front 2 or 3" to match the new bumper height, since it more than likely attaches to the frame...

From what I can see, a 2" body lift might not look that bad on it... Personally, I like the look of a level, or slightly higher in the front look... And absolutely despise having the back end jacked up... If you do go with a leveling kit, and it sits higher, have some airbags installed in the rear to level it out.. air shocks would do the trick as well... Another option would be an add a leaf... although they are usually good for over an inch, usually closer to two