I played Met at the pinball museum in Vegas and it did seem pretty fun though I really didn't log enough time on it. In my home collection, LOTR certainly received a TON of play but you won't find these NIB. Star Trek (Stern) is alright but it wouldn't be my first choice for a 1 pin home. I am actually now playing mostly Star Wars - partly because it is new but also because for me, it hits all the marks (code, sound, music, art etc.). Being a Star Wars nerd from the 80s helps too.
I guess I'd suggest you play a little more of the ones you are interested in. For me, music themes really doesn't do it. I enjoy playing them, but not enough to spend the dough and have it sitting in my house full time.
Merrimack, NH
