Thank you for a well-written article. I bought a slightly-used (400 clicks) M8 in January 2010 for $2500. The M9 had just come out.
The M8 version 2 firmware added discrete mode. I use it exclusively. The M8 is the only Leica M with 1/8000th top shutter speed.
The CCD in the M8 and M8.2 have a "higher well capacity" by about 50% compared to the M9. This means it can handle about 50% more photons hitting each pixel before saturating. The full-frame CCD had to be "thinned", meaning not as much material in each pixel.
If you have not tried it, "the button dance and Raw mode, converted using M8RAW2DNG" gives about an extra stop for speed. The trick is to Underexpose the image by 3 or 4 stops, convert to uncompressed DNG, then "push-process" the image in post.
A four-stop push, shot at ISO 160- underexposed by 4 stops.
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The image as shot.
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