Thanks for the good feedback, Newton.
I noticed the Elan 10s need a bit of amp umph in terms of volume to really get them to open up. Due to a smaller room size, I also have them close to the back wall (2-3 inches), and don't hear any drop in quality.
You're absolutely right about the mid-range improvement. It creates a more immediate presence that was somewhat muted with the M5 (and I'm guessing M5i). I'd say the overall detail is just as good as the M5, while benefiting from the bass and mid improvements.
Now let's see what Mike Creek has in store in 5 years or so as the next generation for this line (not sure I can afford another go around). In the meantime, continue good listening with these Elans, as I'll be there with you!