Quoted from DaddyManD:Really like the projector and really, really want TK lock, but is the Pro acceptable (or more than acceptable?) fun and fine theme integration?
Of course the Pro is acceptable. But to me, the projector is the single most distinguishing Pro vs. Premium feature on any Stern. It's so central to the theme and the vibe, that I just wouldn't give it up. It's not just the main screen. All the targets, drops, and ramps have projections on them. Seeing the drops change to show each successive word that you need to spell is awesome. To see things animate across the standup targets is cool. To see the ramps showing an animated "JACKPOT" during multiballs is cool. They even project the mode timer onto one of the ramp side panels so you don't have to look up (I'm assuming it's on the LCD too?). No other game has a projector like this.
Also, with the new adjustable ramp cover, the TK lock is reliable and is a really cool effect. It obviously catches/locks balls for multiball, but it also catches them during multiball for double jackpots. Really neat.
If you already know you want those features, I wouldn't sacrifice them. If you don't really care for some reason, or you need to / want to save the money, then go Pro.