Lotr is gone in my house and mm is still here. The reason for that is medieval is just such a fun game. Judge for yourself on the rules, I think they are the perfect example of what most people need in a pinball. By that I mean everyone from the novice to the pro can enjoy and understand it and it's difficult to actually beat.
I will own an lotr again someday. For the money I'd pick lotr, but if money were no object mm is my highest rated pin (and pinsides too)