kramer5150, am surprised to see the Muvo Micro/N200 as your source.
I use Muvo N200 with UM2s for jogging, and I must say it sounds fairly poor. Sound signature feels distant, like you are not there with the artist, no warmth to it at all. Even cnet complained about SQ with N200.
The reason I still have it, is that it is the ease of use. AAA rechargables, and it comes with a belt clip

UM2's cord is not long enough to have the player dangle in the pant pocket.