My Eagle came with Reico Titans plus aluminum plates (probably homemade) to extend the front jacks outward for the Toyota it was originally on to clear the fender flares on that truck. As far as I know there is only one variety of the pure mechanical Titans, those provide a lift range of 36", more than enough for most uses.
Mine are the manual mechanical jacks, so I can't tell about the hydraulic jacks, mine came with two crank handles. They have plenty of mechanical advantage so the hand cranks work just fine and give the most accurate adjustment. My Eagle also came with the drill attachment fitting to run the jacks with a electric drill. That works fine as long as your drill is charged, it will run the jacks faster than the handles.
I figure that there is no need for the hydraulic jacks and it's more to go bad and more to fiddle with. If a jack fails on you out in the outback you may be in a world of problem, so keep them as simple and reliable as possible.
Unless you really need the jacks on trips it's better to take them off and leave them home during trips. Less to catch on things and they add quite a bit of weight to the camper. It's only a few bolts to take each one off.