Godfrey
somewhat colored
Ding! Ding! Ding! As someone who shoots a lot indoors, at night and in other poorly lit locations and has to make trade-offs regarding ISO, I find it disheartening when someone says just increase the ISO. Dynamic range and signal-to-noise ratio are all worsened with each increase. Increasing the ISO is not cost-less or consequence-free especially for prints. If the X-Vario has the high-ISO performance of the M [240], I wouldn't want to go much beyond 3200.
I can't compare against a new Leica M, but this is what the Leica X2 produces at ISO 800 to 12500:
https://dl.dropboxusercontent.com/u/25268645/x2-noise/index.html
Seems fine to me, it's the same sensor as in the X Vario I believe. I don't expect to make noiseless 16x20 inch prints at ISO 12500, however.
G