Nobody talks about the Rancho, because it costs as much or more than anybody else, and it's not worth the money to get red parts under your rig vs. blue vs. black.

Calmini's lift doesn't have a problem with bushings. Their steering does, but not their lift. Sure, it may squeak a bit. But here's a shocker... So will everybody elses... Greasing A-Arm bushings has little to no effect. Might help a little as soon as you do it. Not going to help much at all in the long run. If you're worried about a little extra noise, don't offroad...

AC's lift is just fine, as compared to Calmini and SLR. It's also the cheapest of the 3. They have no current issues with thier lifts.

SLR's lift is just fine, too. It's only drawback is price, but it's really not that much more than the other two, if you take into account that you eek out a touch more performance out of it than the others (thought the amount is debateable).

It really just comes down to price. Take your pick on how much you want to spend. With the Nissan, there isn't any crap lifts out there; they all work well, and are built well. How much do you want to spend... That's the only question you should be asking yourself.