those are 3 good pins...all of them fun. Play each one and see what you like.
I own and IJ, but I absolutely love the theme...... its a really fun game as well... (but unlike above I would give AFM the nod over IJ.... AFM is still my fav of all time). I need to upgrade IJ to pinsound and color dmd at some point.
Hobbit has the advantage of the being newer.... big LCD, I really like the sound package in the game.... I have only played it casually but it falls a bit short of the others here from TZ or IJ....BUT I will say, I dont really understand the rules of TH, so please discount my vote.... For some reason when I play that game I find myself just shooting the ramp all the time to get multiball going..... I really need to go study the rules for that machine.