Just to add to this thread, I went ahead and installed the Bestop powerboard NX's this weekend. I went with these because I did not want to remove any panels and dig into the wiring. I can pretty much look at interior trim on a car and it will scratch.
The install was straight forward. I was worried that the transmitters would show up quite a bit on the b-pillar, however they are pretty well hidden and you would need to look for them in order to see them.
Overall the product seems pretty decent the boards are a decent thickness on the extrusion, there was about between a 1/16" and 1/8" inch deflection on mid span of the board when loaded with 360 lbs, which corresponds to about a L/240 to L/360 deflection standard.
The drop down brackets are beefy with very little play on the hinge pins, the actuator gearing is all metal, and the electrical connectors fit together tightly and included a rubber seal at the base of each one. I did add some dielectric grease to the fittings just to help keep corrosion at bay.
The only issue I had was one of the transmitters had a bad battery so I had to go to radioshack in order to get a new battery and all they had were packs of 3 which was $13. I have not contacted Bestop to see if they can send an extra battery.
We will see how they hold up but initial impressions are good.