As for size of winch, I would reccomend 12K, but atleast 10,500 for a Gen II 4dr. Even then, if TRUELY stuck, youll still have to winch and drive. Remember truely stuck is with a traction aid, good tires, and no motion, burried frame deep. For this an 8,000lb winch would be useless, and youll just smoke electrics if you overload them so badly. An 8 or 9K might do something with a SWB. Its the drag you have to overcome. As far as electric Vs hydraulic, you can do some searches for that much debated topic. I like a hydraulic for 100% reliablity, life of rig expectancy, less expensive to install(no 2nd battery, ect), 100% duty cycle, hoist capability, delicate speed for difficult situations, no electrical system taxing, full power pull curve with no loss due to electrical fade, no problem in water.......An electric is definately better for winch and drive, and moderate pulls with little drag as the full power line speed is so much faster. For rockcrawling competition electric is the only way to go as well.