Gonna join in on this one guys. I sold my 1DsMKII, and after seeing images from the MKIII, I cancelled my order ... soooooo ... the DMR jumps to the forefront for DSLR work.
Peter, with the new firmware installed, and using Flexcolor to process the DMR/Imacon files, I ran a test at ISO 800 against my Canon 1DMKIII. Both cameras are about the same spec. 10 meg, 1.3X crop factor. Used a Canon 85/1.2 @ f/1.4 and the 80 Lux wide open to shoot some very low light hand held stuff ... no obvious difference in noise levels @ 800, which is something given the 1DMKIII's reputation for high ISO performance. The DMR is much better than it used to be.
Tip: Use Flexcolor, not Lightroom or ACR. The latest Flex had visibly improved the H3D ISO 800 files, so I thought to use it with the DMR 800 files to see what it could do ... and it was a successful insight.
I also solved all my focusing issues with the DMR by adding a Bright Screen Leica R magnifier.
I didn't think this would come up so didn't save the test files in a larger size, but I was surprised how well the DMR tamed fringing compared to the Canon lens on the sample shot of a wedding hat I did just for myself.
The DMR still holds its own.
Leica top, Canon bottom