I can speak intelligently to Jurassic Park, Stern Star Trek, Star Trek TNG, Last Action Hero, Attack From Mars remake, The Hobbit, World Cup Soccer, Pinbot, and Big Guns in the year I've rotated them through my basement. I have gotten reasonably good at troubleshooting machines, but I would say from a balance perspective of reliability, value, and depth, Stern Star Trek is your winner here.
It is a modern machine that can be had for around $4200. You don't lose any play features from going with the pro. There are very few mechanical moving parts. There is alot to shoot for and some code depth. It is easy to play but hard to master. It is deep enough and challenging enough that you likely won't "blow it up" in a month. It is a smooth shooting Steve Ritchie machine. If you like the theme I would recommend this as your winner. Note that there are other games in this list I enjoy more, but the Stern Star Trek Pro is a great value and I believe well put together from a reliability point of view. If you dive into the hobby head first, spend $4200 on a Stern Star Trek, play the crap out of it for a month and then it just collects dust, you can sell it on pinside for about $4200 and not feel bad about anything.
Good luck!