I would go hydro, especially if you're going to put a FEL on it. That way you can have one hand on the loader control and one on the steering wheel. It's also nice for tight manuvering and inching up to your truck/trailer to load.
I have a 1998 JD 855 with FEL, hoe, "York" rake and brush mower. I would recommend getting at least 30HP if you want a full choice of rear implements. My 24HP only has around 20HP at the rear PTO which is a bit light for some implements such as a wood chipper or post hole digger.