Don't listen to anyone who says the features on JP Prem/LE "absolutely blow away the Pro". They are talking about a moving dinosaur head and a physical lock gate for the raptor pen. It's really not a huge difference, especially when it comes to how the game plays. The shots are the same, the rules are the same, and both have fantastic flow.
I own a Jurassic Park machine, and I don't think I'll ever sell it. The replayability of this machine is off the charts, so it's an incredibly good choice for home ownership. I have heard it's also a consistent earner on location, which doesn't surprise me as the Jurassic Park theme is so beloved as a mantlepiece of pop culture. And while Stern wasn't able to license any of the characters other than Nedry (I mean, they COULD have, but it would have been reflected in the price), they still brought the theme to life in a very satisfying way that feels true to the movies.
You can tell this game was designed by arguably the best pinball player in the world. As you advance in player maturity, you start to really appreciate different aspects of a game like shot-to-shot flow, having shots of varying difficulty, and the ability to pursue different strategies to either go after big scores or just to explore objectives in the game. Jurassic park does all of these things exceedingly well, and it's why it's so fun to play over and over again.
Another reason I love the game is how well the shots are incorporated into the modes. It makes it easy to explain to new players how you're not just bashing the ball around, but rather you are RESCUING stranded park staff while green dinosaurs are roving the playfield, how you need to set a trap and then go grab the dinosaur. Jurassic Park takes the abstract concept of shot objectives, and packs a narrative in front of them to make the whole thing easier to digest for new players. Genius.
I have owned this machine in my home for over a year, I still play it like crazy, and I still find myself pumping money into the ones I find on location. Many pinball people consider it one of the best pinball machines ever made, and I must say I agree.