It is strange because none of what you describe really points in any sort of clear cut direction of what is needed. Its a collection of "wants" with no clear uniform goal. Its kinda like stating, I want a car with at least 2 wheels that rides like a vette but tows like a diesel and can get 40mpg without stating the all important question "what will it be used for?"
The only thing you stated about a Leica is the price.... (btw.. has no exposure comp dial.... )
The only thing you stated about the Canon is the A1 and Full frame
The only thing you stated about the A1 is the metal construction and dials.. ie retro
I don't even know why the X100 is attractive to you (I'm guessing retro) .. much less the X10. (btw.. neither is a rangefinder nor mirrorless and have more in common with P&S)
You stated the 5D is too big to get in too close but an A1 (which you described as an ideal design for your use) with its lenses is really not much smaller....
yet... state that the 5D is only capable for small prints... and don't seem to understand that its just as capable as a street camera as well.
Its almost like a hodgepodge of things people have stated about these various cameras all rolled into one.
Things that are more clear cut are like....
* I want a rangefinder... It behaves as an extension of the eye without the lenses' focal length changing the way I view the world. I see infinite DOF no matter the aperture on the lens so I can see all objects in foreground and background. I like its simplicity. I can see things in and out of the frame unlike the tunnel vision of the SLR.
or
* I want a mirrorless camera... I find it comfortable as a P&S. Its compact size of the body and lens without the disadvantage of a tiny sensor. Its as familiar in use as a P&S and just as laid back. Interchangeable lenses provide for much opportunity to experiment with different types of lenses. PS> No fast primes in mirrorless????? How about a 25mm f/0.95, 25 f/1.4, 45 f/1.8, 20 f/1.7, 14 f/2.5, 45mm f/2.8??? or any number of adaptable lenses.
or
* I want an SLR because it provides the most flexibility. Shoot long and short. Widest set of features and lenses.
or
* I want a P&S because its price point and do it all.... in a package that fits in my pocket.
Or similar.