the M that is... the fuji is awesome...
Fuji is awesome but you need another set of lens. I'd wait for the next M. The fact that it can use my other Canon lenses is already a big +. I don't have any wish to spend more on other lenses except those I can use with my SLR. Also the cost of maintaining 2 different systems is way, way expensive for me to handle. For me, the M is a perfect backup camera and as a light camera when you need one. E.g., I carry my G11 when we go out for weekends and when I want to travel light. It's still usable until ISO 800 for internet purposes. With the M, I think it can do almost everything that my SLR can do and that's a good thing.
What Canon Lenses are you dying to use on an EOS M?
I know my two main lenses (24-70 II and 70-200 2.8 IS II) would be ridiculous on a mirrorless.
The only one I could see using is maybe the 40mm pancake or maybe some EF-S lenses which I would never buy since I have a Full Frame.