I have the Motion 60XT/50XT (before the i) and I enjoy them for movies and music. I have spent a lot of time listening to the XTi followups and for listening and enjoyment, I didn't notice any influential difference. So, if you have played a general sample of media you like, and you had an inclination toward the 60/50 XTI I feel comfortable suggesting that you won't be disappointed.
Note: I also have and regularly enjoy MartinLogan Montis electrostats.