You're asking for opinions here...
Your choice should be between POTC LE and JP Premium.
POTC LE may be difficult to find. Expensive too. Phenomenal pin. Multiball craziness. 5 flippers. Amazing toys/gadgets. Awesome lighting and audio. Nothing else like it really.
I agree with TheLaw. JP Premium would be the choice JP version. Arguably the best Stern ever. It's just awesome all around. Even without all of the hoped for movie/actor/audio licensing. 3 flippers. Fun modes. Super challenging. Bad ass pin.
Those are currently 2 of my favorite machines of all time.
Another excellent choice would be TWD Premium. Some people bag on it. They're just wrong! It's fantastic. An A+.
All 3 have a deep ruleset.
My vote goes to JP Premium.
Also. For SURE somebody here will tell you to buy a JP Pro and another Stern Pro for the price of a POTCLE. Don't listen to them. They're wrong. Stern Pros are pinball "lite".
Junky