Bigger electronis is prefered, but for limited use, just a good newer battery is adequate, that being said I use my 12000 harbor freight winch all the time (for chevys) and run on the stock alternator and a marginally used battery.
A good mount is necesary like wellmax said, some winches will mount to the factor crossmember with drilling. Usually Ill mount a winch with a big 3/8 thick plate or some thick heavy channel. But alot of folks use the premade mounts, I just like to fab stuff.
As for the engos, they look better than the harbor freight ones(mines fine just the cable is frayed to hell). I am considering buying either their model with the built in air compressor for 400 or their 10,000 lb with the synthetic line for 435. Those prices I found at jeep hut. They also have a wire remote for an extra 20.
My biggest reccomendation is if you go with the steel line, take very good care of it. No kinks, no sharp angles, or hooking it to itself. Also watch that it doesnt pile up on one side of the spool. If not your hand will be full of tiny holes from frays.
The Last Great American Hero... the demi-god... to which speed means freedom of the soul.