Yes, after reading reviews about the Harmony M
as well as realizing Gary Diamond recommends that model too,
I'm leaning more towards getting the TC Helicon Harmony M instead of the Roland VP-7 now,
esp realizing the lowest VP-7 street price is $549 vs. $220 for the 'M'.
Even though the VP-7 also includes a headset mic, it's a dynamic mic not condenser.

It appears now the best hi quality way to go may be a Crown 311A condenser headset mic + TC Helicon Harmony M.
Because the Harmony M output vol. level appears to be fixed,
to adjust the mic volume input into the microARRANGER's stereo 'line in' jack may require a small 'inline volume control' device.
Can anyone recommend a suitable one? Thanks. - Scott