Tim Gray
Well-known
Don't get me wrong. I think the M9M is a nifty camera. But not $6300 niftier than the X-Pro.
Even if it was the best camera in the world, the M-M isn't $6300 niftier than the X-Pro. No argument there. Diminishing returns and all. But that's pretty much true of all Leicas.
But, there is a ISO 10,000 DNG floating around from Jono Slack that you can play around with. Looks better in my mind than those linked above.
http://www.slack.co.uk/slack/Download.html