I voted for the 240 as that has been my first and only digital Leica (but my first digital RF was indeed the R-D1, and it was what lead me to this site in the first place all those years ago).
I get along just fine with the 240 and it doesn't get in my way, the image quality is wonderful, and though I wish it was more capable in very low light, I have never been left unable to work because of the camera. It's been my main digital since picking it up in November 2014, to the effect that I sold off my other digital systems late last year as my own needs were changing.
Now. All of that being said, I am the most intrigued by the Monochrom (both versions) as I am very much a black and white shooter in general (but I like having the option to shoot color when I want). I think the Monochrom is an incredibly special tool, and like anything else, when one learns to control and manipulate the nuances of such a tool, they are rewarded with spectacular image quality. I would very much like to pick one up in the future.