Gotta agree with Disco, the topic of winches brings out many opinions, which brand is better, PTO or Electric, Mechanical or hydraulic, wire rope vs synthetic, etc.
I have an iopinion too, wanna hear it? Good.
Nothing, and I mean NOTHING is more potent than a hydraulic winch (pump off transfer case or engine, hydromotor on the winch. You have nearly the effective horsepower of the engine at the winch, and speed is variable by throttle. Drawback, Pretty expensive installation what with pumps, valves, hoses and the winch.
Mechanical PTO, driven off the transfer case, or front pulley in older cases is also very powerfull, but in many winching situations, you will also want to be driving, slipping the clutch as you do so, and everytime you put the clutch in, in the case of the PTO driven winch, the winch also stops. In fact, the transfercase on a series Land Rover should be in neutral anyway. Mechanical winches also don't brake when disengaged. They may have a seperate brake, but it requires you to operate it. I love antiques, but don't know anyone wanting to install a mechanical winch today.
Electric winches all have over running brakes these days. stop the motor, and the load back theough the drumshaft engages an over running disc. Pretty foolproof. The argument that you kill your battery holds water, about a teacup full. Full load on the winch is the highest current drain, but it's usually for a brief time. If you're pulling yourself up a 100 foot, 45 degree incline, your going to need to give the motor a break part way up, aside from the fact you're burning about 200 -250 amps. Keeping the engine revs at 1500 or so and your charging back at 100 amps. Most mud situations and you'll only need a short pull to get unstuck, though maybe many times.
I have two winches on my 110. Both electric. I wish I had a hydraulic up front, as that does more retrieving than getting me out of the bog. The rear one is used more than enough, getting myself unstuck. I;m not lucky enough to have company when I'm stuck, as it usually isn't playtime, but work.
My front winch is a planetary Warn 9000. It's OK enough, but the rear winch is a Ransey worm gear drive rated at 12K, but if Moses still wants that mountain moved, it sure would give it hell. I'll take worm drive over planetary anyday, except they are heavier, and not as compact as planetry. As to whose you buy, they all make planetary, and I guess they all are pretty much the same. Ramsey is the only one I know of still making worm gear drive.
Here endeth the opinion.