DPA 4061 > D100 (no BB) with the Mic Att switch at 20 and input level @ 3 seems to work well for stage lip recording of an experimental post-metal band.
I just did two shows (open taping!) with the D100 and head-baffled 4061s compared to the dozens, maybe hundreds with the M10 by now.
The lockable input knob is great and is easier to see/adjust than the M10. The unit boots up quickly and USB 2.0 transfers much more quickly than the USB 1.1 on the M10. I've found the M10 microSD card slot too frustrating to align properly so I leave the microSD in the M10.
What I don't like about the D100 compared to the M10:
1. The Hold switch does not lock the power switch, making it easy to turn off accidentally. I'm used to the M10 which has a combined power/hold switch, and I can more easily operate it by touch without taking it out of my pocket.
This is my biggest frustration with the D100.
The M10 is not easy to turn off: a good thing!
2. Hold switch prevents the backlight from coming up at all. The light is completely innocuous and possibly cannot damage a recording (unlike the power switch), yet Sony decided to have Hold protect the light and not the power switch! WTF!?
With the M10, I can touch a button, wait a few seconds for the Hold warning to clear, and peek down my pocket to check levels without disturbing anyone else. This is not something I'd be comfortable doing with the D100 given the idiotic Hold switch implementation.
3. Unlike the M10, having the Hold switch engaged does not prevent the PiP toggle dialog from popping up when I plug in my mics. It will prompt the user and force them to disable Hold. The M10 remembers the PiP setting when the Hold switch is engaged. I can work around this by turning the unit off before plugging in the mics.
4. The mic-in jack is on the side, making it more susceptible to strain when placed in a pocket. For open taping, I used the bundled carrying-case worn on my belt so it was not an issue. This is with a right-angle 1/8" Neutrik to terminate my 4061s.
The 5 second pre-record buffer is awesome on both recorders compared to the R-09 I used before. A 10 second pre-record would be even better
Unlike the M10, the D100 runs Linux. I've dabbled in Linux kernel development, but Sony seems to have locked down the ability to manually install software despite distributing the sources: http://oss.sony.net/Products/Linux/Audio/PCM-D100.html