The stock black top is slightly textured so it takes sanding and a several quotes of primer to prep. A shop will charge several hundred dollars for the extra prep but the painted tops usually carry a premium so it may be a wash.I would suggest leaning toward a used body colored top, over a basic black top. They aren't the same. It will be easier to re-paint the top that was already a body color, and to attempt to smooth out the textured black top.
Keep in mind, the only body colored items that come with a Sarhara are the fender flares. The Freedom 3 pc. body color top for a 4 dr. is an $1895 option. I would check with a dealer and see what other models have the body colored top option.Does the body color matched hard top only come with the Sahara? Or is it an add on that any model can add?