I'm a big fan of the Pro model pricing as a home collector on a limited budget and a thirst for a bigger collection. My thinking is that I can buy the Pro model and put that other money into the next game.
I think it would be better to have one playfield for both Pro and Limited Edition machines and just load up the LE with "bling". Plaque, certificate, mirrored backglass, powder coated trim, shaker motor, subwoofer and whatever else they can pack in. One playfield = one lot of game code to focus on.
I do see positives of the Pro machine for a site operator though. Cheaper price and less mechanics to worry about and things breaking down. Example: the Metallica hammer mechanism.
In summary: I hope Stern never do away with their Pro model and competitive price point. I would never have bought new in box if it wasn't for AC/DC and reasonable pricing. I would love to get a Jersey Jack pinball in the collection, but $10,995 is far too much at this point in my life.