This is quite interesting because Stern's Lord of the Rings is one of their best (and most complex) games and would create a natural comparison, but it will be quite hard to outdo compared to taking on more recent (read: cheaper) Sterns.
On that topic I wish I could find a fully functional LoTR as I came late to it and now everyone I find has critical flaws. There's one in the Minneapolis airport that is broken, and I've played one in London that mostly works except the ring sensor is broken so you can't destroy the ring, which you only discover after an epic game. Apparently there is a setting compensate for this, but the operator won't turn it on. Incidentally, I almost beat Martin Ayub's (he's mentioned in the article) high score of 350M on this machine, and were it not for this fault I certainly would have. And of course without that it is also impossible to reach what is reputed to be the most difficult-to-reach wizard mode in the history of pinball: Valinor.