The HP improvements are over stock set up are exaggerated. They will free up a few HP but thats all. If you have a stock set up in good working condition I would have to say keep it. The electric fans are easy to install. Flex-a-lite are the most popular but there are other brands that are just as good quaility wise. The shrouded fans cool best in town and on the trail but can be restrictive on the highway but for a stock motor they will cool fine.
Nothing is foolproof to a sufficiently talented fool.
I used to run a Taurus fan and it worked quite well. It was very nice having the giant OE fan shroud gone, especially when changing belts, water pumps, etc. I do claim to notice a small power increase and mpg increase. I ran it for for or 5 years.
I had mine on a thermo switch which would turn the fan on at ~210 degrees. I also had a 3 position switch on the dashboard which let me run auto (thermo switch), manually off, and manually on.
I ended up taking it out and putting the OE fan in a few years back though. It was working fine, but with many of my winter trips going as far out into the snow as possible, I wanted to go back to the dumb simplicity of the mechanical fan, as well as taking some load off of the electrical system for winching. I run a 136 amp alternator from a Dodge 5.2L which was more than enough for running the fan, but would get overworked running both the winch and the fan. (As if winching isn't hard enough on an alternator). Perhaps some day I may get crazy and run a very high output alternator, or duals, but for now I am back to the mech. fan.
1997 Wrangler SE: 2.5L, NV3550, NV241OR, HP30 front, Rock Jock 60 rear, 4.88s/Detroit Lockers, 35" TrXus MT, TOM WOOD 'shafts, Warn XD9000i, pollock with a skinny pedal behind the wheel