I say gears. Superchargers are cool, but like others said they will increase wear and tear, it's another failure point, and you have to run premium. It seems like premium is running about $.50 more than regular at least now versus the $.20 more it used to be a few years ago. If you drive 20k miles a year, at 17 MPG, and gas is $2.00 for regular and $2.50 for premium you're spending $600 more a year on gas. And that's assuming you can get premium for only $.50 more. I've been seeing $.70-.80 even in some gas stations along interstates and stuff.
I like gears, less wear and tear and it'll make the truck drive like stock. These trucks aren't fast stock, but they have plenty of power to get out of their own way. Plus if you throw a locker in the front and rear you're basically unstoppable. You don't gain any more off road ability with a SC.
If I had the chance to pick up a SC cheap I certainly would, but I'd be torn on putting it on my truck, or selling it for a quick profit and throwing that money towards gears, other truck stuff, or just pocketing it.
