SuperLift, hands down. This is the lift that Mopar will sell you for more $$$.
This lift maintains factory suspension geometry front AND rear.
All three mfr use the same principal design to raise the front, "lower" the bottom "half" of the suspension and differential, and span the additional distance with taller knuckles.
The key here is getting it right. In order to maintain proper, vibration free driveline angles, the differential housing must be lowered AND rotated slightly or you are going to get vibration from the from the front DS. As such, the length of the DS must be increased(using a spacer) only two of the kits here do this. The third does not...guess which one is notorious for 4wd vibes...
The control arms, track bar and sway bar are all relocated in the rear. This method ensures proper axle centering, suspension arm geometry both static and during travel. it also gives you the correct pinion angle to eliminate rear driveline vibration. Install is a bit more work buy it is well worth it.
Another thing to consider is the quality of the components, I cant speak to the others but I can tell you that the Superlift stuff is extremely well made and very very stout. Every weldment has interlocking tabs and slots to keep dimensional accuracy. They also provide a full width THICK skidplate that joins the front crossmembers into a single part, very sturdy-Its how I've been jacking up the front of the truck since installation.
I installed it with a friend in one long day, after an alignment the truck handles and rides as good or better than factory(I opted for Bilstiens Front and rear). The truck has ZERO quirks, vibrations or other issues related to the lift.
