If you are talking about suspension lifts, then you have two more options - Superlift and Rancho.
Rough Country's lift is just like the Rancho lift and the A/C lift if I'm not mistaken. I didn't realize that Skyjacker made a lift for Nissan's. In any case, all the a-arm/torision lifts are basically the same in the front (Superlift has greasable arms and the others don't). I don't have any of them on my vehicle though so I am just repeating what I have read/seen other places.
<font color=red>89 Nissan KingCab 4x4</font color=red>