FWIW I bought the one of the last of the Motifs, right at the point where the Motif-X was just about to be released. I don't regret buying it, but, I'm a firm believer in the Folded Motion Transducer and think the Motif-X would be a slight improvement.
That being said, a slightly larger center speaker would be welcome so it could blend just a tiny bit better with my Vistas. I run my system hard on Movie Nights and it all works very well, especially when lots of action sounds are moving across the front speakers, but when it's quieter and it's mostly the center speaker by itself I'd like a bit more "body" to the sound.
Lastly, a speaker as old as the Theater is one that would be cause for concern about the age of the stat panel.